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GMS81C2120 Datasheet

  • GMS81C2120

  • CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & ...

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Hyundai Micro Electronics
GMS81C2020/GMS81C2120
GMS81C2020 / GMS81C2120
CMOS Single-Chip 8-Bit Microcontroller
with A/D Converter & VFD Driver
1. OVERVIEW
1.1 Description
The GMS81C2020 and GMS81C2120 are an advanced CMOS 8-bit microcontroller with 20K/12K bytes of ROM. These
are a powerful microcontroller which provides a highly flexible and cost effective solution to many VFD applications. These
provide the following standard features: 20K/12K bytes of ROM, 448 bytes of RAM, 8-bit timer/counter, 8-bit A/D convert-
er, 10-bit High Speed PWM Output, Programmable Buzzer Driving Port, 8-bit Basic Interval Timer, 7-bit Watch dog Timer,
8-bit, Serial Peripheral Interface, on-chip oscillator and clock circuitry. They also come with high voltage I/O pins that can
directly drive a VFD(Vacuum Fluorescent Display).
In addition, the GMS81C2020 and GMS81C2120 support power sav-
ing modes to reduce power consumption.
This document is only explained for the base of GMS81C2020(GMS81C2120), the eliminated functions are same as below.
Device name
GMS81C2020
GMS81C2012
*GMS87C2020
GMS81C2120
GMS81C2112
*GMS87C2120
ROM Size
20Kbytes
12Kbytes
20Kbytes
(EPROM)
20Kbytes
12Kbytes
20Kbytes
(EPROM)
RAM Size
448bytes
448bytes
448bytes
448bytes
448bytes
448bytes
Ports
R0,R1,R2,R3,R4,R5,R6,R7
R0,R2,R3,R5,R6
R0,R1,R2,R3,R4,R5,R6,R7
R0,R1,R2,R3,R4,R5,R6,R7
R0,R2,R3,R5,R6
R0,R1,R2,R3,R4,R5,R6,R7
Package
64 SDIP, 64MQFP, 64LQFP, 64TQFP
64SDIP, 64MQFP, 64LQFP, 64TQFP
64SDIP, 64MQFP, 64LQFP, 64TQFP
42SDIP, 44MQFP, 40PDIP
42SDIP, 44MQFP, 40PDIP
42SDIP, 44MQFP, 40PDIP
[The * Mark Devices are OTP Version]
Nov. 1999 Ver 0.0
preliminary
1

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