This manual introduces the features and characteristics of HMS77C1000A/HMS77C1001A single-chip microcomputers, including overview, block diagram, pin assignment, package diagram, pin function, port structures, electrical characteristics, etc.
The document describes the Hynix HMS77C1000A and HMS77C1001A as advanced CMOS 8-bit single-chip microcontrollers featuring 0.5K or 1K words of EPROM and 25 bytes of RAM. These devices offer a high-performance RISC CPU with up to 33 single-word instructions and operate at speeds from DC to 20 MHz.
| Program Memory Size (HMS77C1000A) | 0.5K words(12-bit) |
|---|---|
| Data Memory Size | 25 bytes |
| Operating Speed (RC, XT, LF) | DC - 20 MHz clock input |
| Minimum Instruction Execution Time | 200ns @20MHz |
| Supply Voltage (RC, XT, LF) | 2.5V to 5.5V |
| Supply Voltage (HF) | 4.5V to 5.5V |
EC0 serves as an external clock input to Timer0 and should be tied to VSS or VDD if not in use.
The minimum instruction execution time is 200ns when operating at a 20MHz clock.
The device requires an operating voltage between 4.5V and 5.5V when using the HF oscillator.
A little current, with a maximum of 1mA at around 2V, may flow if an uncertain voltage level is applied.