Copyright 2000 Advanced Micro Devices, Inc. All rights reserved.
Publication# 22025
Rev: B Amendment/0
Issue Date: May 2000
Am186
TM
CU
High-Performance, 80C186-Compatible
16-Bit Embedded USB Microcontroller
DISTINCTIVE CHARACTERISTICS
s
E86TM family of x86 embedded processors
offers improved time-to-market
Software migration (backwards- and upwards-
compatible)
World-class development tools, applications, and
system software
s
Serial Communications Peripherals
Universal Serial Bus (USB) peripheral controller
High-Speed UART with autobaud
UART
Synchronous serial interface (SSI)
SmartDMATM channels (4) to support USB
s
System Peripherals
Three programmable 16-bit timers
Hardware watchdog timer
General-purpose DMA (4 channels)
Programmable I/O (48 PIO signals)
Interrupt Controller (36 maskable interrupts)
s
Memory and Peripheral Interface
Integrated DRAM controller
Glueless interface to RAM/ROM/Flash memory
(55-ns Flash memory required for zero-wait-state
operation at 50 MHz)
Fourteen chip selects (8 peripherals, 6 memory)
External bus mastering support
Multiplexed and nonmultiplexed address/data bus
Programmable bus sizing
8-bit boot option
s
Available in the following package:
160-pin plastic quad flat pack (PQFP)
25-, 40-, and 50-MHz operating frequencies
Low-voltage operation, V
CC
= 3.3 V 0.3 V
Commercial and industrial temperature rating
5-V-tolerant I/O (3.3-V output levels)
GENERAL DESCRIPTION
The Am186TMCU USB microcontroller is a member of
AMD's Comm86TM family of communications-specific
microcontrollers. The microcontroller is a derivative of
the Am186CC communications controller and is pin-
compatible with that device.
The Am186CU USB microcontroller is a cost-effective,
hig h -p er fo r m a nc e mic ro c o n tro l l e r s o l u tio n fo r
communications applications. This highly integrated
microcontroller enables customers to save system
c o s t s a n d i n c r e a s e p e r f o r m a n c e o v e r 8 - b i t
microcontrollers and other 16-bit microcontrollers.
The microcontroller offers the advantages of the x86
development environment's widely available native
development tools, applications, and system software.
Additionally, the microcontroller uses the industry-
standard 186 instruction set that is part of the AMD
E86TM family, which continually offers instruction-set-
compatible upgrades.
Built into the Am186CU USB microcontroller is a wide
range of communications features required in many
communications applications, including the Universal
Serial Bus (USB) peripheral controller that designers
can use to implement a variety of microcontroller-
based USB peripheral devices for telephony, audio, or
other high-end applications. The USB controller does
not suppor t USB host or hub functions, but the
Am186CU USB microcontroller can be used to
implement USB peripheral functions in a device that
also contains separate USB hub circuitry.
Comprehensive development support is available from
AMD and its FusionE86
SM
par tners. A customer
development platform board is available. AMD and its
FusionE86 partners also offer boards, schematics,
drivers, protocol stacks, and routing software to enable
fast time to market.
2
Am186TMCU USB Microcontroller Data Sheet
ORDERING INFORMATION
25 = 25 MHz
40 = 40 MHz
50 = 50 MHz
TEMPERATURE RANGE
SPEED OPTION
DEVICE NUMBER/DESCRIPTION
LEAD FORMING
\W=Trimmed and Formed
Valid combinations list configurations planned to be
supported in volume for this device. Consult the
local AMD sales office to confirm availability of
specific valid combinations and to check on newly
released combinations.
Valid Combinations
PACKAGE TYPE
K=160-Pin Plastic Quad Flat Pack (PQFP)
Am186CU high-performance 80C186-compatible
16-bit embedded USB microcontroller
50
K
C
\W
Valid Combinations
Am186CU25
Am186CU40
Am186CU50
KC\W
Am186CU25
Am186CU40
KI\W
Am186CU
C= Am186CU Commercial (T
C
=0
C to +100
C)
I = Am186CU Industrial (T
A
=40
C to +85
C)
where: T
C
= case temperature
where: T
A
= ambient temperature
Am186TMCU USB Microcontroller Data Sheet
3
TABLE OF CONTENTS
Distinctive Characteristics ............................................................................................................ 1
General Description ..................................................................................................................... 1
Ordering Information .................................................................................................................... 2
Logic Diagram By Interface ......................................................................................................... 6
Logic Diagram By Default Pin Function ....................................................................................... 7
Pin Connection Diagram--160-Pin PQFP Package .................................................................... 8
Pin and Signal Tables .................................................................................................................. 9
Signal Descriptions ............................................................................................................... 12
Architectural Overview ............................................................................................................... 24
Detailed Description .............................................................................................................. 24
Am186TM Embedded CPU .................................................................................................... 25
Memory Organization ............................................................................................................ 25
I/O Space .............................................................................................................................. 25
Serial Communications Support ............................................................................................ 26
Universal Serial Bus ......................................................................................................... 26
Four SmartDMATM Channels............................................................................................ 26
Two Asynchronous Serial Ports ....................................................................................... 26
Synchronous Serial Port................................................................................................... 26
System Peripherals ............................................................................................................... 27
Interrupt Controller ........................................................................................................... 27
Four General-Purpose DMA Channels ............................................................................ 27
48 Programmable I/O Signals .......................................................................................... 27
Three Programmable Timers ........................................................................................... 27
Hardware Watchdog Timer .............................................................................................. 27
Memory and Peripheral Interface .......................................................................................... 28
System Interfaces............................................................................................................. 28
DRAM Support ................................................................................................................. 30
Chip Selects ..................................................................................................................... 30
Clock Control ......................................................................................................................... 31
In-Circuit Emulator Support ................................................................................................... 31
Applications ............................................................................................................................... 31
Clock Generation and Control ................................................................................................... 32
Features ................................................................................................................................ 32
System Clock ........................................................................................................................ 32
USB Clock ............................................................................................................................. 32
Clock Sharing by System and USB ....................................................................................... 33
Crystal-Driven Clock Source ................................................................................................. 34
External Clock Source ........................................................................................................... 35
Static Operation .................................................................................................................... 35
PLL Bypass Mode ................................................................................................................. 35
UART Baud Clock ................................................................................................................. 35
Power Supply Operation ............................................................................................................ 36
Power Supply Connections ................................................................................................... 36
Input/Output Circuitry ............................................................................................................ 36
PIO Supply Current Limit ...................................................................................................... 36
Absolute Maximum Ratings ....................................................................................................... 37
Operating Ranges ...................................................................................................................... 37
Driver Characteristics--Universal Serial Bus ............................................................................ 37
DC Characteristics over Commercial and Industrial Operating Ranges .................................... 38
Capacitance ............................................................................................................................... 38
Maximum Load Derating ............................................................................................................ 39
Power Supply Current ................................................................................................................ 39
4
Am186TMCU USB Microcontroller Data Sheet
Thermal Characteristics--PQFP Package ................................................................................ 40
Commercial and Industrial Switching Characteristics and Waveforms ...................................... 41
Switching Characteristics over Commercial and Industrial Operating Ranges ......................................48
Appendix A--Pin Tables ............................................................................................................ A-1
Pin List Table Column Definitions ........................................................................................ A-9
Appendix B--Physical Dimensions: PQR160, Plastic Quad Flat Pack (PQFP) ........................ B-1
Appendix C--Customer Support ...............................................................................................C-1
Related AMD Products--E86TM Family Devices ..................................................................C-1
Related Documents ..............................................................................................................C-2
Am186CC/CH/CU Microcontroller Customer Development Platform ..................................C-2
Third-Party Development Support Products .................................................................................C-2
Customer Service .................................................................................................................C-2
Hotline and World Wide Web Support............................................................................. C-2
Corporate Applications Hotline........................................................................................ C-2
World Wide Web Home Page ......................................................................................... C-3
Documentation and Literature ......................................................................................... C-3
Literature Ordering .......................................................................................................... C-3
Index .................................................................................................................................. Index-1
LIST OF FIGURES
Figure 1.
Am186CU USB Microcontroller Block Diagram .................................................... 24
Figure 2.
Two-Component Address Example ...................................................................... 25
Figure 3.
Am186CU Microcontroller Address Bus -- Default Operation .............................. 29
Figure 4.
Am186CU Microcontroller--Address Bus Disable In Effect .................................. 29
Figure 5.
System and USB Clock Generation ...................................................................... 33
Figure 6.
Suggested System Clock Frequencies, Clock Modes, and Crystal Frequencies . 34
Figure 7.
External Interface to Support Clocks--Fundamental Mode Crystal ...................... 34
Figure 8.
External Interface to Support Clocks--External Clock Source ............................. 35
Figure 9.
UART and High-Speed UART Clocks ................................................................... 35
Figure 10.
Typical I
cc
Versus Frequency ................................................................................ 39
Figure 11.
Thermal Resistance(
C/Watt) ............................................................................... 40
Figure 12.
Thermal Characteristics Equations ....................................................................... 40
Figure 13.
Key to Switching Waveforms ................................................................................ 41
Figure 14.
Read Cycle Waveforms ........................................................................................ 50
Figure 15.
Write Cycle Waveforms ......................................................................................... 53
Figure 16.
Software Halt Cycle Waveforms ........................................................................... 54
Figure 17.
Peripheral Waveforms ........................................................................................... 55
Figure 18.
Reset Waveforms .................................................................................................. 56
Figure 19.
Signals Related to Reset (System PLL in 1x or 2x Mode) .................................... 57
Figure 20.
Signals Related to Reset (System PLL in 4x Mode) ............................................. 57
Figure 21.
Synchronous Ready Waveforms ........................................................................... 58
Figure 22.
Asynchronous Ready Waveforms ......................................................................... 59
Figure 23.
Entering Bus Hold Waveforms .............................................................................. 60
Figure 24.
Exiting Bus Hold Waveforms ................................................................................. 60
Figure 25.
System Clocks Waveforms--Active Mode (PLL 1x Mode) ................................... 62
Figure 26.
USB Clocks Waveforms ........................................................................................ 62
Figure 27.
USB Data Signal Rise and Fall Times .................................................................. 63
Figure 28.
USB Receiver Jitter Tolerance .............................................................................. 63
Figure 29.
SSI Waveforms ..................................................................................................... 64
Figure 30.
DRAM Read Cycle without Wait States Waveform ............................................... 65
Figure 31.
DRAM Read Cycle with Wait States Waveform .................................................... 66
Figure 32.
DRAM Write Cycle without Wait States Waveform ............................................... 66
Figure 33.
DRAM Write Cycle with Wait States Waveform .................................................... 67
Am186TMCU USB Microcontroller Data Sheet
5
Figure 34.
DRAM Refresh Cycle Waveform ........................................................................... 67
LIST OF TABLES
Table 1.
PQFP Pin Assignments--Sorted by Pin Number .................................................. 10
Table 2.
PQFP Pin Assignments--Sorted by Signal Name ................................................ 11
Table 3.
Signal Descriptions Table Definitions..................................................................... 12
Table 4.
Signal Descriptions ............................................................................................... 13
Table 5.
Segment Register Selection Rules ....................................................................... 25
Table 6.
Crystal Parameters ................................................................................................ 34
Table 7.
Typical Power Consumption Calculation................................................................ 39
Table 8.
Thermal Characteristics (
C/Watt) ........................................................................ 40
Table 9.
Alphabetical Key to Switching Parameter Symbols .............................................. 42
Table 10.
Numerical Key to Switching Parameter Symbols .................................................. 45
Table 11.
Read Cycle Timing ................................................................................................ 48
Table 12.
Write Cycle Timing ................................................................................................ 51
Table 13.
Software Halt Cycle Timing ................................................................................... 54
Table 14.
Peripheral Timing ................................................................................................. 55
Table 15.
Reset Timing ......................................................................................................... 56
Table 16.
External Ready Cycle Timing ................................................................................ 58
Table 17.
Bus Hold Timing .................................................................................................... 60
Table 18.
System Clocks Timing ........................................................................................... 61
Table 19.
USB Clocks Timing ............................................................................................... 62
Table 20.
USB Timing ........................................................................................................... 63
Table 21.
SSI Timing ............................................................................................................. 64
Table 22.
DRAM Timing ........................................................................................................ 65
Table 23.
Power-On Reset (POR) Pin Defaults ................................................................... A-2
Table 24.
Multiplexed Signal Trade-Offs .............................................................................. A-5
Table 25.
PIOs Sorted by PIO Number ................................................................................ A-6
Table 26.
PIOs Sorted by Signal Name ............................................................................... A-7
Table 27.
Reset Configuration Pins (Pinstraps) ................................................................... A-8
Table 28.
Pin List Table Definitions....................................................................................... A-9
Table 29.
Pin List Summary ............................................................................................... A-10
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