ST

ST20P18

16K 8-bit Single Chip Microcontroller

Notice: Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice. This is not a final specification.

Some parameters are subject to change.

Ver 1.4

6/13/07

1

S

8-Bit Static Pipeline CPU

ROM: 16K x 8 bits PROM(OTP)

RAM: 192 x 8 bits

32-Level Deep Stack

Operating Voltage : 2.4V ~ 5.5V

Power-on Timer(PWRT)

- Pin option to enable

General-Purpose I/O (GPIO) Ports

- 28 pins are programmable CMOS I/O (Port-A/B/C and

Port-E low nibble),20 pins (Port-A high nibble &

Port-B/C) are shared with LCD Segments

- 8 open drain output pins share with LCD COMs

- Hardware de-bounce option for Port-A

- Bit programmable pull-up for input pins

2 Input Pins

- OTP option bit to select (shared with OSCX)

30 Output Pins

- Eight are shared with LCD com and twenty are shared

with LCD Segments, two are shared with PSG

Timer / Counter

- One 8-bit timer / 16-bit event counter

- One 8-bit BASE timer

Five Powerful Interrupt Sources

- External interrupt (edge trigger) / RFC interrupt(Share

with external interrupt)

- TIMER1 interrupt

- BASE timer interrupt

- PORTA[7~0] interrupt (transition trigger)

- DAC reload interrupt

Watchdog Timer (WDT)

- With its own low power internal oscillator for reliability

- Four selectable time bases

- WDT reset CPU only

- OTP option bit to enable

- One option bit is selectable to reset or not in WAI1 and

STP mode

Dual Clock Source with Warm-up Timer

- OSCX: Low frequency crystal oscillator with 32768Hz

- OSC: High frequency RC oscillator from 500K ~ 8MHz

CPU clock 250K ~ 4MHz

On-chip Internal Oscillator for WDT

- < 5uA typical, 3V, 27℃

LCD Controller Driver

- 16 level contrast control

- 320 ( 8x40) dots ( 1/8 duty, 1/4 bias, programmable)

- 160 ( 4x40) dots ( 1/4 duty, 1/3 bias, programmable)

- Two clock source options: RC and resonator oscillator

- Keyboard scan function supported on 40 shared

segment drives

- Internal bias resistors(1/4 bias & 1/3 bias) with 32 level

driving strength control

Programmable Sound Generator (PSG)

- Tone generator

- Sound effect generator

- 16 level volume control

- Digital DAC for speech / tone

Resistor Frequency Converter (RFC)

- Up to 4 resistors measurement

- Built-in one independent 16-bits counter without

sharing with timer counter

- 3 clock sources for RFC counter: SYSCK, OSCX and

INTX

- 5 scales of clock divider for RFC counter

Carrier Wave Generator(CGR)

- Built-in one digital PLL

- Standard clock rate output for remote control

Three Power Down Modes

- WAI0 mode

- WAI1 mode

- STP mode