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.
1. FEATURES
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
Ver 1.4
1
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12
6/13/07
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
