Description

The GMS77C1000 and GMS77C1001 are an advanced CMOS 8-bit microcontroller with 0.5K/1K words(12-bit) of EPROM. The Hynix Semiconductor GMS77C1000 and GMS77C1001 are a powerful microcontroller which provides a high flexibility and cost effective solution to many small applications. The GMS77C1000 and GMS77C1001 provide the following standard features: 0.5K/1K words of EPROM, 25 bytes of RAM, 8-bit timer/counter, power-on reset, on-chip oscillator and clock circuitry. In addition, the GMS77C1000 and GMS77C1001 supports power saving modes to reduce power consumption.

Features

• High-Performance RISC CPU:

- 12-bit wide instructions and 8-bit wide data path

- 33 single word instructions

- 0.5K/1K words on-chip program memory

- 25 bytes on-chip data memory

- Minimum instruction execution time 200ns @20MHz

- Operating speed: DC - 20 MHz clock input

- Seven special function hardware registers

- Two-level hardware stack

• Peripheral Features:

- Twelve programmable I/O lines

- One 8-bit timer/counter with 8-bit programmable prescaler

- Power-On Reset (POR)

- Power Fail Detector : noise immunity circuit 2 level detect ( 3V, 2.5V )

- Internal Reset Timer (IRT)

- Watchdog Timer (WDT) with on-chip RC oscillator

- Programmable code-protection

- Power saving SLEEP mode

- Selectable oscillator options: Configuration word

RC: Low-cost RC oscillator (200KHz~4MHz)

XT: Standard crystal/resonator (455KHz~4MHz)

HF: High-speed crystal/resonator (4~20MHz)

LF: Power saving, low-frequency crystal/resonator (32~200KHz)

• CMOS Technology:

- Low-power, high-speed CMOS EPROM technology

- Fully static design

- Wide-operating range:

2.5V to 5.5V @ RC, XT, LF

4.5V to 5.5V @ HF