ST20P16

Ver 1.5

6/10

6/13/07

VDD

: 3V

Clock

: 32768Hz crystal and 4.0MHz RC oscillator

LCD

: 1/8 duty

I/O

: PORT A

ALARM

: PSG0, PSG1

FIGURE 6-2: APPLICATION CIRCUIT WITH LCD KEYBOARD AWAKING PULSE

Note:

1. COMs and SEGs output GND level, while the LCD is turned off.

2. If LCD is turned off, Keyboard Awaking Pulses must be turned off at the same

time.

3. Connect one capacitor of 100PF to OSCI stabilize oscillation frequency. This

capacitor must be placed close to OSCI.

4.The functions of PWRT have been added in the ST20P18. When ST20P18 is used as

ST20P16,please connect to GND.