LC877816A/12A/08A

No.A0635-2/21

Minimum Bus Cycle Time

• 250ns (4MHz)

Note: The bus cycle time indicates ROM read time.

Minimum Instruction Cycle Time (tCYC)

• 750ns (4MHz)

Power Save Mode

• Power save mode is available, when system clock is RC oscillation or crystal oscillation.

Ports

• Input/output ports

Data direction programmable for each bit individually:

12 (P1n, P70 to P73)

Data direction programmable in nibble units:

8 (P0n)

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

• LCD ports

Segment output:

24 (S00 to S23)

Common output:

4 (COM0 to COM3)

Bias terminals for LCD driver

5 (V1 to V3, CUP1, CUP2)

Other functions

Input/output ports:

8(PCn)

• Oscillator pins:

4 (CF1, CF2, XT1, XT2)

• Reset pin:

1 (RES)

• Power supply:

4 (VSS1 to 2, VDD1 to 2)

1 (VDC)

LCD Controller

• Seven display modes are available.

• Segment output (S16 to S23) can be switched to general purpose input/output ports.

• Duty: 1/3duty, 1/4duty

• Bias: 1/2bias, 1/3bias

• LCD power

1) 1/3bias V1: 1.2V to 1.8V

V2: 2.4V to 3.6V

V3: 3.6V to 5.4V

2) 1/2bias V1: 1.2V to 1.8V

V2: 2.4V to 3.6V

V3: 2.4V to 3.6V

(connect V2 and V3)

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: 2 channel 8 bit timer/counter (with toggle output)

Mode 1: 2 channel 8 bit PWM

Mode 2: 16 bit timer/counter (with toggle output) Toggle output from lower 8 bits is also possible.

Mode 3: 16 bit timer (with toggle output) Lower order 8 bits can be used as PWM.

• 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 (with toggle output)

• Timer 7: 8-bit timer with 6-bit prescaler (with toggle output)

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