LC877C64C/56C/48C/40C/32C/24C

No.A0135-2/21

RAM

• 2048 × 9 bits (LC877C64C/56C)

• 1536 × 9 bits (LC877C48C/40C/32C/24C)

Minimum Instruction Cycle Time

• 250 ns (12MHz)

VDD=4.5 to 5.5V

• 300 ns (10MHz)

VDD=2.8 to 5.5V

• 750 ns (4MHz)

VDD=2.2 to 5.5V

Ports

• Input/output ports

Data direction programmable for each bit individually:

20 (P1n, P70 to P73, P8n)

Data direction programmable in nibble units:

8 (P0n)

(When N-channel open drain output is selected, data can be input in bit units.)

• Input ports:

2 (XT1, XT2)

• Output ports:

2 (PWM2, PWM3)

• LCD ports

Segment output:

32 (S00 to S15, S24 to S39)

Common output:

4 (COM0 to COM3)

Bias terminals for LCD driver:

3 (V1 to V3)

Other functions

Input/output ports:

32 (PAn, PBn, PDn, PEn)

Input ports:

7 (PLn)

• Oscillator pins:

2 (CF1, CF2)

• Reset pin:

1 (RES)

• Power supply:

6 (VSS1-3, VDD1-3)

LCD Controller

• Seven display modes are available (static, 1/2, 1/3, 1/4 duty × 1/2, 1/3 bias)

• Segment output and common output can be switched to general purpose input/output ports.

Small Signal Detection (MIC signals etc)

• Counts pulses with the level which is greater than a preset value

• 2 bit counter

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/ counter with toggle output function

Mode 0: 8-bit timer with 8-bit prescaler (and toggle output) + 8-bit timer / counter with 8-bit prescaler

(and toggle output)

Mode 1: 2 channel 8-bit PWM with 8-bit prescaler

Mode 2: 16-bit timer / counter with 8-bit prescaler (and toggle output)

(Toggle output also possible using the lower order 8 bits)

Mode 3: 16-bit timer with 8-bit prescaler (and toggle output)

(The lower order 8 bits can be used as PWM output)

• Timer 4: 8-bit timer with 6-bit prescaler

• Timer 5: 8-bit timer with 6-bit prescaler

• Timer 6: 8-bit timer with 6-bit prescaler (and toggle output)

• Timer 7: 8-bit timer with 6-bit prescaler (and toggle 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 of five different time intervals are possible.