SANYO LC876694B, LC876662B Datasheet

Ordering number : ENN*6843

LC876694B/78B/62B

8-Bit Single-Chip Microcontroller

Preliminary Overview

The LC876694B/LC876678B/LC876662B are 8 bit single chip microcontrollers with the following on-chip functional blocks :

- CPU: operable at a minimum bus cycle time of 100ns

- On-chip ROM Maximum Capacity : LC876694B 96K bytes LC876678B 80K bytes LC876662B 64K bytes

- On-chip RAM: 2048 bytes

- VFD automatic display controller / driver

- 16 bit timer / counter (can be divided into two 8 bit timers)

- 16 bit timer / PWM (can be divided into two 8 bit timers)

- timer for use as date / time clock

- High speed clock counter

- System clock divider function

- synchronous serial I/O port (with automatic block transmit / receive function)

- asynchronous / synchronous serial I/O port

- 12-channel × 8-bit AD converter

- Weak signal detector

- 15-sour ce 10-vec tored in terrupt syst em

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

Features

(1) Read-Only Memory (ROM): LC876694B 98304 × 8 bits

LC876678B 81920 × 8 bits LC876662B 65536

(2) Random Access Memory (RAM): LC876694B/78B/62B 2048 × 9 bits (3) Minimum Bus Cycle Time: 100ns (10MHz)

Note: The bus cycle time indicates ROM read time.

(4) Minimum Instruction Cycle Time: 300ns (10MHz)

8 bits

CMOS IC

Ver.1.01 51000

11901 RM (IM) SK No.6843-1/23

LC876694B/78B/62B

(5) Ports

- Input/output ports Data direction programmable for each bit individually : 20 (P1n, P70 to P73, P8n)

- 15V withstand input/output ports Data direction programmable in nibble units : 8 (P0n) (When N-channel open drain output is selected, data can be input in bit units.) Data direction programmable for each bit individually : 8 (P3n)

- Input ports : 2 (XT1,XT2)

- VFD output ports Large current outputs for digits : 9 (S0 / T0 to S8 / T8) Large current outputs for digits / segments : 7 (S9 / T9 to S15 / T15) digit / segment outputs : 8 (S16 to S23) segment outputs : 28 (S24 to S51)

Other functions

Input/output ports : 12(PFn, PG0 to 3) Input ports : 24 (PCn, PDn, PEn)

- Oscillator pins : 2 (CF1,CF2)

- Reset pin : 1 (RES#)

- Power supply : 6 (VSS1 to 2, VDD1 to4)

- VFD power supply : 1 (VP)

(6) VFD automatic display controller

- Programmable segment/digit output pattern Output can be switched between digit/segment waveform output (pins 9 to 24 can be used for output of digit waveforms). parallel-drive available for large current VFD.

- 16-step dimmer function available

(7) Weak signal detection (MIC signals etc)

- Counts pulses with width greater than a preset value

- 2 bit counter

(8) Timers

- Timer 0: 16 bit timer / counter with capture register Mode 0: 2 channel 8-bit timer with programmable 8 bit prescaler and 8 bit capture register Mode 1: 8 bit timer with 8 bit programmable prescaler and 8 bit capture register + 8 bit Counter with 8-bit capture register Mode 2: 16 bit timer with 8 bit programmable prescaler and 16 bit capture register Mode 3: 16 bit counter with 16 bit capture register

- Timer 1: PWM / 16 bit timer toggle output Mode 0: 2 channel 8 bit timer (with toggle output) Mode 1: 2 channel 8 bit PWM Mode 2: 16 bit timer (with toggle output) Toggle output also possible using lower order 8 bits. Mode 3: 16 bit timer (with toggle output) Lower order 8 bits can be used as PWM output.

- Base Timer

1) The clock signal can be selected from any of the following :

Sub-clock (32.768kHz crystal oscillator), system clock, and prescaler output from timer 0

2) Interrupts can be selected to occur at one of five different times.

(9) High speed clock counter

1) Capable of counting maximum : 20MHz clock (Using main clock 10MHz)

2) Real time output

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LC876694B/78B/62B

(10) Serial-interface

- SIO 0: 8 bit synchronous serial Interface

1) LSB first / MSB first function availa ble

2) Internal 8 bit baud-rate generator (maximum transmit clock period 4 / 3 Tcyc)

3) Continuous automatic data communication (1-256 bits)

- SIO 1: 8 bit asynchronous / synchronous serial interface Mode 0: Synchronous 8 bit serial IO (2-wire or 3-wire, transmit clock 2–512 Tcyc) Mode 1: Asynchronous serial IO (half duplex, 8 data bits, 1 stop bit, baud rate 8–2048Tcyc) Mode 2: Bus mode 1 (start bit, 8 data bits, transmit clock 2–512 Tcyc) Mode 3: Bus mode 2 (start detection, 8 data bits, stop detection)

(11) AD converter

-8 bits × 12 channels

(12) Remote control receiver circuit (connected to P73 / INT3 / T0IN terminal)

-Noise rejection function (noise rejection filter time constant can selected from 1 / 32 / 128 Tcyc)

(13) Watchdog timer

- The watching timer period is set using an external RC.

- Watchdog timer can produce interrupt, system reset

(14) Interrupts: 15-source, 10-vectored interrupts

1) Three priority (low, high and highest) multiple interrupts are supported. During interrupt handling, an equal or

lower priority interrupt request is refused.

2) If interrupt requests to two or more vector addresses occur at once, the higher priority interrupt takes precedence.

In the case of equal priority levels, the vector with the lowest address takes precedence.

(15) Subroutine stack levels: 1024 levels max. Stack is located in RAM.

(16) Multiplication and division

- 16 bit × 8 bit (executed in 5 cycles)

- 24 bit × 16 bit (12 cycles)

- 16 bit ÷ 8 bit (8 cycles)

- 24 bit ÷ 16 bit (12 cycles)

(17) Oscillation circuits

- On-chip RC oscillation circuit for system clock use.

- On-chip CF oscillation circuit for system clock use. (R

- On-chip Crystal oscillation circuit low speed system clock use. (Rd, R

built in)

external)

(18) System clock divider function

- Able to reduce current consumption Available minimum instruction cycle time: 300ns, 600ns, 1.2µs, 4.8µs, 9.6µs, 19.2µs, 38.4µs, 76.8µs.

(Using 10MHz main clock)

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LC876694B/78B/62B

(19) Standby function

- HALT mode HALT mode is used to reduce power consumption. Program execution is stopped. Peripheral circuits still operate but VFD display and some serial transfer operations stop.

1) Oscillation circuits are not stopped automatically.

2) Release occurs on system reset or by interrupt.

-HOLD mode HOLD mode is used to reduce power consumption. Both program execution and peripheral circuits are stopped.

1)CF, RCand crystal oscillation circuits stop automatically.

2) Release occurs on any of the following conditions. (1) input to the reset pin goes low (2) a specified level is input at least one of INT0, INT1, INT2 (3) an interrupt condition arises at port 0

-X’tal HOLD made X’tal HOLD mode is used to reduce power consumption. Program execution is stopped. All peripheral circuits except the base timer are stopped.

1) CF and RC oscillation circuits stop automatically.

2) Crystal oscillator is maintained in its state at HOLD mode inception.

3) Release occurs on any an any of the following conditions (1) input to the reset pin goes low (2) a specified level is input to at least one of INT0, INT1, INT2 (3) an interrupt condition arises at port 0 (4) an interrupt condition arises at the base-timer

(20) Factory shipment

-delivery form QIP100E

(21) Development tools

- Evaluation chip: LC876095

- Emulator: EVA62S + ECB876600 (Evaluation chip board) + SUB876500 + POD100QFP

- Flash ROM version: LC87F66C8A

No.6843-4/23

Pin Assignment

S48/PG0 S49/PG1 S50/PG2 S51/PG3

P00 P01 P02

P03 VSS2 VDD2

P04

P05

P06

P07

P10/SO0

P11/SI0/SB0

P12/SCK0

P13/SO1

P14/SI1/SB1

P15/SCK1

LC876694B/78B/62B

S47/PF7

S46/PF6

S45/PF5

S44/PF4

S43/PF3

S42/PF2

S41/PF1

S40/PF0

VDD4

S39/PE7

S38/PE6

S37/PE5

S36/PE4

S35/PE3

S34/PE2

S33/PE1

S32/PE0

S31/PD7

S30/PD6

S29/PD5

S28/PD4

S27/PD3

S26/PD2

S25/PD1

8079787776757473727170696867666564636261605958575655545352 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

1 2 3 4 5 6 7 8 9

P30

P31

P32

P33

P16/T1PWML

P17/T1PWMH/BU

P34

P35

P36

P37

RES

CF1

CF2

VSS1

VDD1

P80/AN0

P81/AN1

P82/AN2

P83/AN3

P84/AN4

P85/AN5

XT1/AN10

XT2/AN11

P86/AN6

S24/PD0

P87/AN7/MICIN

S23/PC7

P70/INT0/T0LCP/AN8

S22/PC6

P71/INT1/T0HCP/AN9

S21/PC5

P72/INT2/T0IN/NKIN

S20/PC4

P73/INT3/T0IN

50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31

S0/T0

S19/PC3 S18/PC2 S17/PC1 S16/PC0 VDD3 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

SANYO: QIP100E

No.6843-5/23

System Bl ock Diagram

Interrupt Control

LC876694B/78B/62B

IR PLA

SIO0

SIO1

Timer 0

(High speed clock

Timer 1

counter)

Stand-by C ontr ol

X’tal

Clock

Generator

Bus Interface

Port 0

Port 1

Port 3

Port 7

ROM

ACC

B Register

C Register

ALU

Base Timer

VFD Controller

INT0-3

Noise Rejection Filter

Port 8

ADC

Weak Signa Detector

PSW

RAR

RAM

Stack Pointer

Watch Do g Timer

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LC876694B/78B/62B

Pin Assignment

Pin name I/O Function Option

VSS1 VSS2

VDD1 VDD2 VDD3 VDD4 VP - • Power supply (-) No PORT0 P00 to P07

PORT1 P10 to P17

PORT3 P30 to P33

PORT7 P70 to P73

- • Power supply (-) No

- • Power supply (+) No

I/O • 8bit input/output port

• data direction programmable in nibble units

• Use of pull-up resistor can be specified in nibble units

• Input for HOLD release

• Input for port 0 interrupt

• 15V withstand at N-channel open drain output

I/O • 8bit input/output port

• data direction programmable for each bit

• Use of pull-up resistor can be specified for each bit

• Other pin functions P10 SIO0 data output P11 SIO0 data input/bus input/output P12 SIO0 clock input/output P13 SIO1 data output P14 SIO1 data input/bus input/output P15 SIO1 clock input/output P16: Timer 1 PWML output P17: Timer 1 PWMH output/Buzzer output

I/O • 8bit Input/output port

• Data direction can b e specified for each bit

• Use of pull-up resistor can be specified for each bit

• 15V withstand at N-channel open drain output

• 4bit Input/output port

I/O

• Data direction can b e specified for each bit

• Use of pull-up resistor can be specified for each bit

• Other func tions P70: INT0 input/HOLD release input/Timer0L capture Input/output for watc h dog timer P71: INT1 input/HOLD release input/Timer0H capture input P72: INT2 input/HOLD release input/timer 0 event input/Timer0L capture input/High

speed clock counter input

P73: INT3 input(noise rejection filter attached input)/timer 0 event input/Timer 0H

capture input AD input port: AN8(P70), AN9(P71) The following types of interrupt detection are possible:

Yes

INT0 INT1 INT2 INT3

Rising Falling Rising/

Yes Yes Yes Yes

falling

No Yes Yes

H level L level

Yes Yes

No No

Yes Yes

No No

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