IC 12C509-04P

High-Performance RISC CPU
- Only 33 single word instructions to learn
- All instructions are single cycle (1µs) except for program branches
- Operating speed: DC - 4MHz clock input
- 1024 Byte EPROM Program Memory
- 41 Byte RAM Data Memory
- Internal 4MHz RC Oscillator with programmable calibration
- In-circuit serial programming

Peripheral Features
- 8-bit real time clock/counter(TMR0) with 8-bit programmable prescalar
- Power-On Reset
- Watchdog Timer (WDT) with separate RC oscillator
- Power saving SLEEP mode
- Wake-up from SLEEP on pin change
- Selectable oscillator options

CMOS Technology
- Low power, high speed CMOS EPROM/ROM technology
- Fully Static Design
- Low Power Consumption
- < 2mA @ 5V, 4MHz
- 15µA typical @ 3V, 32kHz
- < 1µA typical standby current

I/O and Packages
- 6 Programmable I/O Lines
- 8-pin DIP

Pin Description
1 Vdd - Positive Power Supply
2 GP5/OSC1/CLKIN - See Data Sheet
3 GP4/OSC2 - Bi-directional data port / Oscillator crystal output
4 GP3/MCLR/Vpp - See Data Sheet
5 GP2/TOCK1 - Bi-directional data port
6 GP1 - Bi-directional data port / serial programming clock
7 GP0 - Bi-directional data port / serial programming data
8 Vss - Ground