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HMCS40 - Hitachi
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Hitachi HMCS40
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Developer Hitachi
Manufacturer Hitachi
Type microcontrollers
Production 1978-1995
ISA HMCS40
Word size 4 bit
0.5 octets
1 nibbles
Technology pMOS, CMOS
Clock 400 kHz-4.5 MHz
Package DIP28, DIP42, QFP64

The Hitachi HMCS40 is a family of 4-bit microcontrollers developed by Hitachi and introduced in the late 1970s and continued well into the 90s. Two types of each component were manufactured, one using pMOS for low cost and another using CMOS where lower power was more desired. Hitachi later also introduce a replacement series called the HMCS400.

The chips contained 4-bit ALU performing BCD arithmetic. 512 to 2,048 Words (10-bit ea) of program ROM. Additional 128 Words (10-bit ea) of pattern ROM. 32 to 160 digits (4-bit ea) of data RAM. Chips also contained Event/Timer-Counter and 22-44 I/O lines. Output was aimed for driving dot matrix Liquid Crystal displays. The HMCS40 was used in a very large array of games, toys, controllers, and office equipment, specifically many devices with VFDs.

Devices[edit]

Model ROM RAM Registers Stack Registers I/O Lines Part No.
HMCS42 512x10-bit 32x4-bit 4 2 22 HD38702
HMCS43 1024x10-bit 80x4-bit 6 3 32 HD38750, HD38755
HMCS43C 1024x10-bit 80x4-bit 6 3 32 HD38750
HMCS43CL 1024x10-bit 80x4-bit 6 3 32 HD38755
HMCS44 2048x10-bit 160x4-bit 8 4 32 HD38800, HD38805
HMCS44C 2048x10-bit 160x4-bit 8 4 32 HD44801
HMCS44CL 2048x10-bit 160x4-bit 8 4 32 HD44808
HMCS45 2048x10-bit 160x4-bit 6 4 44 HD44820, HD44828
HMCS45C 2048x10-bit 160x4-bit 6 4 44 HD44820
HMCS45CL 2048x10-bit 160x4-bit 6 4 44 HD44828
HMCS46 4096x10-bit 256x4-bit 8 4 32 HD44840, HD44848
HMCS46C 4096x10-bit 256x4-bit 8 4 32 HD44840
HMCS46CL 4096x10-bit 256x4-bit 8 4 32 HD44848
HMCS47 4096x10-bit 256x4-bit 6 4 44 HD44860, HD44868
HMCS47C 4096x10-bit 256x4-bit 6 4 44 HD44860
HMCS47CL 4096x10-bit 256x4-bit 6 4 44 HD44868
LCD-III 2048x10-bit 160x4-bit 6 4 32 HD44795, HD44790
LCD-IV 4096x10-bit 256x4-bit 6 4 32 HD613901

Design[edit]

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ISA[edit]

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Documents[edit]

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Facts about "HMCS40 - Hitachi"
designerHitachi +
full page namehitachi/hmcs40 +
instance ofmicrocontroller family +
instruction set architectureHMCS40 +
main designerHitachi +
manufacturerHitachi +
nameHitachi HMCS40 +
packageDIP28 +, DIP42 + and QFP64 +
technologypMOS + and CMOS +
word size4 bit (0.5 octets, 1 nibbles) +