91400 RM (IM) SK No.6699-1/21

Ver.1.05

O0499

Preliminary
Overview

The LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B microcontrollers are 8-bit single chip microcontrollers
with the following on-chip functional blocks:

- CPU : Operable at a minimum bus cycle time of 0.5µs (microsecond)
- On-chip ROM Maximum Capacity : 48K bytes
- On-chip RAM Capacity : 1152/768/640/512 bytes

(LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B)

- 16-bit timer /counter (or two 8-bit timers)
- 16-bit timer /PWM (or two 8-bit timers)
- 8-channel

8-bit AD converter

- Two 8-bit synchronous serial-interface circuits (1-channel

16bit, 1-channel

8bit)

- 14-source 10-vectored interrupt system

All of the above functions are fabricated on a single chip.

8-Bit Single Chip Microcontroller

LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B

Ordering number : ENN*6699

CMOS IC

LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B

No.6699-2/21

Features

(1) Read-Only Memory (ROM)

: LC866448B

49152

8 bits

LC866444B

45056

8 bits

LC866440B

40960

8 bits

LC866436B

36864

8 bits

LC866432B

32768

8 bits

LC866428B

28672

8 bits

LC866424B

24576

8 bits

LC866420B

20480

8 bits

LC866416B

16384

8 bits

LC866412B

12288

8 bits

LC866408B

8192

8 bits

(2) Random Access Memory (RAM) : LC866448B/44B/40B/36B

1152

8 bits

LC866432B/28B/24B

768

8 bits

LC866420B/16B

640

8 bits

LC866412B/08B

512

8 bits

(3) Bus Cycle Time/Instruction Cycle Time

The LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B are constructed to read ROM twice within one

instruction cycle. It has 1.7 times more performance capability within the same instruction cycle compared to our 4-bit
microcomputers (LC66000 series).
Bus cycle time indicates the speed to read ROM.

Bus cycle time

Cycle time Clock divider

System clock oscillation

Oscillation Frequency

Voltage

0.5

s 1

1/1

Ceramic resonator oscillation

6MHz

4.5V to 6.0V

s 4

1/1

Ceramic resonator oscillation

3MHz

2.5V to 6.0V

7.5

s 15

1/1

RC resonator oscillation

800kHz

2.5V to 6.0V

183

s 366

1/2

Crystal oscillation

32.768kHz

2.5V to 6.0V

(4) Ports

- Input/output ports

: 1 port (8 terminals : port 1)

Input/output programmable in a bit

- 15V withstand Input/Output ports

: 2 ports (12 terminals)

Input/output port programmable in nibble unit

: 1 port (8 terminals : port 0)

(When the N-channel open drain output is selected, the data in a bit can be inputted.)
Input/output port programmable in a bit

: 1 port (4 terminals : port 3)

- Input port

: 2 ports (14 terminals : port 7,8)

- VFD output port

: 38 terminals

Large current output for digit

: 16 terminals

Pull-down resistor option available

- Other function

Input/output port

: 1 port (6 terminals : port E)

Input port

: 2 ports (16 terminals : port C,D)

(5) VFD automatic dislay controller

-Segment/digit output pattern programmable

Any segment/digit combination available
VFD parallel-drive available

- 16-step dimmer function available

(6) AD converter

- 8-channel

8-bit AD converter

(7) Serial-interface

- 1 channel

16-bit serial-interface circuits

- 1 channel

8-bit serial-interface circuits

- LSB first / MSB first function available

- Internal 8-bit baud-rate generator in common with two serial-interface circuits

LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B

No.6699-3/21

(8) Timer

- Timer 0

16-bit timer/counter
2-bit prescaler + 8-bit programmable prescaler

Mode 0 : Two 8-bit timers with programmable prescaler
Mode 1 : 8-bit timer with programmable prescaler + 8-bit counter
Mode 2 : 16-bit timer with programmable prescaler
Mode 3 : 16-bit counter

The resolution of Timer is tCYC. (tCYC: cycle time)

- Timer 1

16-bit timer/PWM

Mode 0 : Two 8-bit timers
Mode 1 : 8-bit timer + 8-bit PWM
Mode 2 : 16-bit timer
Mode 3 : Variable-bit PWM (9-16 bits)

In Mode 0 and Mode 1,the resolution of Timer and PWM is tCYC.
In Mode 2 and Mode 3,the resolution of Timer and PWM selectable: tCYC or 1/2 tCYC by program

- Base timer

Every 500ms overflow system for a clock application (using 32.768kHz crystal oscillation for Base timer clock)
Every 976µs, 3.9ms, 15.6ms, 62.5ms overflow system (using 32.768kHz crystal oscillation for Base timer clock)
The Base timer clock selectable; 32.768kHz crystal oscillation, System clock, and programmable prescaler output of
Timer 0

(9) Buzzer output

- The Buzzer sound frequency selectable; 4KHz, 2KHz (using 32.768kHz crystal oscillation for Base

timer clock)

(10) Remote-control receiver circuit (Shares with the P73/INT3/T0IN terminal)

- Noise Rejection function (the time constant of noize rejection filter: 1tCYC/16tCYC/64tCYC)

(tCYC: instruction cycle time)

- Switch Polarity function

(11) Watchdog timer

- The watchdog timer is taken on RC outside
- Watchdog timer operation selectable: interrupt system, system reset

(12) Interrupt system

- 14-source 10-vectored interrupts :

1. External interrupt INT0 (include watchdog timer)
2. External interrupt INT1
3. External interrupt INT2, Timer/counter T0L (Lower 8-bit)
4. External interrupt INT3, Base timer
5. Timer/counter T0H (Upper 8-bit)
6. Timer T1L, Timer T1H
7. Serial-interface SIO0
8. Serial-interface SIO1
9. AD converter

10. VFD automatic display controller, Port 0

- Built-in Interrupt Priority control register

Microcontroller allows 3 levels of interrupt; low level, high level, and highest level of multiplex interrupt. It can
specify a low level or a high level interrupt priority from INT2/T0L through port 0
(i.e. the above interrupt number from three through ten). It can also specify a low level or the highest level interrupt
priority to INT0 and INT1.

LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B

No.6699-4/21

(13) Real-time service operation

The Real-Time Service (RTS) functions the 4-byte data-transfer between the Special Function Registers at
acknowledging the interrupt request.
The RTS starts within 1 instruction cycle-time and completes within 5 instructions cycle-time after occurring the
interrupt request.

(14) Subroutine stack levels

- 128 levels (Max.): Stack area included in RAM area

(15) Multiplication and division

16-bit

8-bit (7 instruction cycle times)

16-bit / 8-bit (7 instruction cycle times)

(16) Three oscillation circuits

- On-chip RC oscillation circuit using for the system clock.
- On-chip CF oscillation circuit using for the system clock.
- On-chip crystal oscillation circuit using for the system clock and for time-base clock.

(17) Standby function

- HALT mode function

The HALT mode is used to reduce power dissipation. In this operation mode, program execution is stopped. This
operation mode can be released by interrupt request signals or the initial system reset request signal.

- HOLD mode function

The HOLD mode is used to freeze all the oscillations;
RC (internal), CF and Crystal oscillations. This mode can be released by the following operations.

· Reset terminal ( RES ) set to Low level
· P70/INT0/T0IN, P71/INT1/T0IN terminals set to assigned level (programmable)
· Input a Port 0 interrupt condition

(18) Factory shipment

· QFP80E delivery form

(19) Development support tools

Evaluation (EVA) chip

: LC866097

EPROM version

: LC86E6449

One time version

: LC86P6449

Emulator

: EVA-86000 + ECB866400 (Evaluation chip board) + POD866400 (POD)

Notice for use

1. Set VDD=4.0V to 6.0V at using S16 to S37 as input port.
2. Follow the under table.

Frequency range of the system clock

Voltage range

Clock Divider

Note

15kHz to 30kHz

1/1

Can not use 1/2 divider

30kHz to 6MHz

4.5V to 6.0V

1/1,1/2

15kHz to 30kHz

1/1

Can not use 1/2 divider

30kHz to 1.5MHz

1/1,1/2

1.5MHz to 3MHz

2.5V to 6.0V

1/2

Can not use 1/1 divider

4.5V to 6.0V

1/1,1/2

Internal RC oscillation

2.5V to 6.0V

1/2

Can not use 1/1 divider

LC866448B/44B/40B/36B/32B/28B/24B/20B/16B/12B/08B

No.6699-5/21

Pin Assignment

QIP80E

Package Dimension

(unit : mm)

3174

SANYO : QIP-80E

P00
P01
P02
P03
P04
P05
P06
P07

VSS2

P10/SO0

P11/SI0/SB0

P12/SCK0

P13/SO1

P14/SI1/SB1

P15/SCK1

P16/BUZ

S15/T15
S14/T14
S13/T13
S12/T12
S11/T11
S10/T10
S9/T9
S8/T8
S7/T7
S6/T6
S5/T5
S4/T4
S3/T3
S2/T2
S1/T1
S0/T0

17/P

70/I

1/P

2/P

SS1

VDD1

80/A

81/A

82/A

83/A

84/A

85/A

86/A

87/A

71/I

72/I

2/T

0
I
N

73/I

3/T

0
I
N

37/P

36/P

35/P

34/P

33/P

32/P

31/P

30/P

29/P

28/P

27/P

26/P

25/P

24/P

23/P

22/P

2
1/P

20/P

19/P

18/P

17/P

16/P

VDD2

65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LC866412B

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LC866412B