FS9912

Rev. 3.6

28/34

034H

LCD5

SEG9 [3:0], SEG10 [3:0]

035H

LCD6

SEG11 [3:0], SEG12 [3:0]

036H

LCD7

SEG13 [3:0], SEG14 [3:0]

037H

LCD8

SEG15 [3:0], SEG16 [3:0]

038H

LCDEN

LCDEN

LCD Common Driver Waveform

COM1

VSS

1/3 RLCD

2/3 RLCD

RLCD

COM2

VSS

1/3 RLCD

2/3 RLCD

RLCD

COM3

VSS

1/3 RLCD

2/3 RLCD

RLCD

COM4

VSS

1/3 RLCD

2/3 RLCD

RLCD

32Hz

LCD Common Driver Waveform

LCDEN =1 will start the LCD clock.

LCD1~LCD8 is the LCD display data area.

11.11 Watch Dog Timer

Address

Name

Content

04H

STATUS

PD

TO

C

Z

00DH

TMCON

TRST,

WTS2

WTS1

WTS0

TMEN

INS2

INS1

INS0

8 bits Counter1

Watch Dog

Timer

Oscillator

WDTEN

Multiplex

WDTA[7:0]

WDTS[2:0]

8 bits Counter2

WDTOUT

CLRWDT

WDTEN is an external input pin. It can be connected to VDD and then starts watchdog timer oscillator. If

it is floated or connected to VSS, the watchdog timer function will be disabled.

When WDT Counter 2 overflows, it will send WDTOUT to reset the CPU and set TO flag.