GMS87C1102 / GMS87C1202 is an advanced CMOS 8-bit microcontroller from HYUNDAI MicroElectronics with 2K bytes of ROM. It is a powerful microcontroller that provides a highly flexible and cost effective solution to many small applications.
This manual describes the Hyundai GMS87C1102 and GMS87C1202 8‑bit CMOS microcontrollers. It lists the core features such as 2 KB OTP ROM, 128 B RAM, 8‑bit timer/counter, 8‑bit A/D converter, 10‑bit high‑speed PWM, and power‑saving modes. Development tools, block diagrams, package dimensions, pin assignments, and port structures are also covered.
The document includes the instruction set, branch/jump operations, and control operation details, making it a complete reference for designers and programmers working with these devices.
| ROM size | 2 KB OTP |
|---|---|
| RAM size | 128 bytes |
| Operating voltage | 2.7 V to 6.0 V |
| Operating temperature | -20 °C to +85 °C (standard), -40 °C to +125 °C (E‑grade) |
| PWM resolution | 10‑bit high‑speed PWM |
| Programmable I/O lines (GMS87C1102) | 11 |
The microcontroller provides 2 KB of OTP ROM.
It operates from 2.7 V up to 6.0 V.
The GMS87C1102 version has 11 programmable I/O lines.
The RESET pin resets the MCU.