OKI OLMS-40
Developer	OKI
Manufacturer	OKI
Type	microcontrollers
Introduction	1978 (announced)
Production	1979
ISA	OLMS-40
Word size	4 bit 0.5 octets 1 nibbles
Technology	CMOS
Clock	32 kHz-4.2 MHz
Package	DIP28, DIP42, FP32, FP44, FP60

OLMS-40 was a family of 4-bit microcontrollers developed by OKI announced in 1978 and released in 1979. OKI also introduced the OLMS-50/OLMS-60/OLMS-65, a low-power version of this family and OLMS-64 a high-frequency version.

Members

Part	ROM	RAM	I/O	Stack	Inst.	Frequency	Package	Notes
MSM5840	2048x8 b	128x4 b	8	4	98	4.2 MHz	DIP42, FP44
MSM5842	768x8 b	32x4 b	8	1	52	4.2 MHz	DIP28, FP32
MSM58421	1536x8 b	40x4 b	8	1	52	4.2 MHz	FP60
MSM58422	1536x8 b	40x4 b	8	1	52	4.2 MHz	FP60
MSM5847	1536x8 b	96x4 b	7	2	43	32 kHz	FP44

Design

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ISA

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See also

• OLMS-50, OLMS-60, OLMS-65, a low-power versions
• OLMS-64 a high-frequency version

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