CMOS 8-bit Single Chip Microcomputer
Description
The CXP84120/84124 is a CMOS 8-bit single chip
micro-computer integrating on a single chip an A/D
converter, serial interface, timer/counter, time base
timer, capture timer/counter, remote control reception
circuit and other servo systems besides the basic
configurations of 8-bit CPU, ROM, RAM, and I/O
port.
The CXP84120/84124 also provides a power-on
reset function and a sleep/stop function that enables lower power consumption.
Features
Wide-range instruction system (213 instructions) to cover various types of data
-- 16-bit arithmetic/multiplication and division/Boolean bit operation instructions
Minimum instruction cycle
400ns at 10MHz operation
122s at 32kHz operation
Incorporated ROM capacity
20K bytes (CXP84120)
24K bytes (CXP84124)
Incorporated RAM capacity
624 bytes
Peripheral functions
-- A/D converter
8 bits, 8 channels, successive approximation method
(Conversion time of 32s/10MHz)
-- Serial interface
SIO with 8-bit, 8-stage FIFO incorporated for data use
(Auto transfer for 1 to 8 bytes), 1 channel
8-bit standard SIO, 1 channel
-- Timer
8-bit timer
8-bit timer/counter
19-bit time base timer
16-bit capture timer/counter
32kHz timer/counter
-- Remote control reception circuit
Incorporated noise elimination circuit
Incorporated 8-bit, 6-stage FIFO for measurement data
-- PWM output
14 bits, 1 channel
Interruption
14 factors, 15 vectors, multi-interruption possible
Standby mode
Sleep/stop
Package
80-pin plastic QFP
Piggyback/evaluation chip
CXP84100 80-pin ceramic QFP
Structure
Silicon gate CMOS IC
1
E92234A81-PS
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any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
CXP84120/84124
80 pin QFP (Plastic)
4
CXP84120/84124
Pin Description
Symbol
I/O
Description
I/O/Analog input
PA0/AN0
to
PA7/AN7
(Port A)
8-bit I/O port. I/O can be
set in a unit of single bit.
Incorporation of the
pull-up resistance can be
set through the software
in a unit of 4 bits.
(8 pins)
Analog inputs to A/D converter.
(8 pins)
I/O
PC0 to PC7
(Port C)
8-bit I/O port. I/O can be set in a unit of single bit. Capable of driving
12mA sink current. Incorporation of pull-up resistor can be set through
the software in a unit of 4 bits.
(8 pins)
I/O
PD0 to PD7
(Port D)
8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-
up resistor can be set through the software in a unit of 4 bits.
(8 pins)
I/O
PF0 to PF7
(Port F)
8-bit I/O port. I/O can be set in a unit of single bit. Incorporation of
pull-up resistor can be set through the software in a unit of 4 bits.
(8 pins)
Input/Input
Input/Input
Input/Input
Input/Input
Output/Output
Output/Output/
Output
PE0/EC0
PE1/EC1
PE2/RMC
PE3/NMI
PE4/PWM
PE5/TO/ADJ
(Port E)
6-bit port. Lower 4 bits
are for inputs; upper
2 bits are for outputs.
(6 pins)
External event inputs for timer/counter.
(2 pins)
Remote control reception circuit input.
Non-maskable interruption request input.
14-bit PWM output.
Rectangular wave output for 16-bit
timer/counter. Output for 32kHz oscillation
frequency division.
I/O/Input
I/O/Input
I/O/I/O
I/O/Input
I/O/Output
I/O/I/O
I/O/Input
Output/Output
PB0/CINT
PB1/CS0
PB2/SCK0
PB3/SI0
PB4/SO0
PB5/SCK1
PB6/SI1
PB7/SO1
(Port B)
7-bit I/O port in which I/O
can be set in a unit of
single bit. Also, an
uppermost bit (PB7)
exclusively for output.
Incorporation of pull-up
resistor can be set
through the software in a
unit of 4 bits.
(8 pins)
External capture input to 16-bit timer/counter.
Chip select input for serial interface (CH0).
Serial clock I/O (CH0).
Serial data input (CH0).
Serial data output (CH0).
Serial clock I/O (CH1).
Serial data input (CH1).
Serial data output (CH1).
5
CXP84120/84124
Symbol
I/O
Description
I/O
PG0 to PG7
(Port G)
8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-
up resistor can be set through the software in a unit of 4 bits.
(8 pins)
I/O
PH0 to PH7
(Port H)
8-bit I/O port. I/O can be set in a unit of single bits. Incorporation of pull-
up resistor can be set through the software in a unit of 4 bits.
(8 pins)
I/O/Input
PI0/INT0
to
PI3/INT3
I/O
PI4 to PI7
Input
Crystal connectors for system clock oscillation. When the clock is supplied
externally, input to EXTAL; opposite phase clock should be input to XTAL.
EXTAL
Output
XTAL
Input
Crystal connectors for 32kHz timer/counter clock generation circuit.
Connect a 32kHz crystal oscillator between TEX and TX.
For usage as event input, connect clock oscillation source to TEX, and
open TX.
TEX
Output
TX
Input
Low-level active, system reset.
RST
NC. Under normal operating conditions, connect to V
DD
.
NC
Input
Reference voltage input for A/D converter.
AV
REF
A/D converter GND.
AVss
Positive power supply.
V
DD
GND
Vss
(Port I)
8-bit I/O ports. I/O can be set in a unit of single
bit. Incorporation of pull-up resistor can be set
through the software in a unit of 4 bits.
(8 pins)
External interruption
request inputs.
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