Oki MSM80C154S User Manual

Semiconductor

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259

MSM80C154S/83C154S

¡ Semiconductor

GENERAL DESCRIPTION

The MSM80C154S/MSM83C154S, designed for the high speed version of the existing
MSM80C154/MSM83C154, is a higher performance 8-bit microcontroller providing low-power
consumption.
The MSM80C154S/MSM83C154S covers the functions and operating range of the existing
MSM80C154/83C154/80C51F/80C31F.
The MSM80C154S is identical to the MSM83C154S except it does not contain the internal
program memory (ROM).

FEATURES

• Operating range

Operating frequency

: 0 to 3 MHz (V

cc

=2.2 to 6.0 V)

0 to 12 MHz (V

cc

=3.0 to 6.0 V)

0 to 24 MHz (V

cc

=4.5 to 6.0 V)

Operating voltage

: 2.2 to 6.0 V

Operating temperature

: –40 to +85

°

C (Operation at +125

°

C conforms to

the other specification.)

• Fully static circuit
• Upward compatible with the MSM80C51F/80C31F
• On-chip program memory

: 16K words x 8 bits ROM (MSM83C154S only)

• On-chip data memory

: 256 words x 8 bits RAM

• External program memory address space : 64K bytes ROM (Max)
• External data memory address space

: 64K bytes RAM

• I/O ports

: 4 ports x 8 bits

(Port 1, 2, 3, impedance programmable)

: 32

• 16-bit timer/counters

: 3

• Multifunctional serial port

: I/O Expansion mode
: UART mode (featuring error detection)

• 6-source 2-priority level

Interrupt and multi-level
Interrupt available by programming IP and IE registers

• Memory-mapped special function registers
• Bit addressable data memory and SFRs
• Minimum instruction cycle

: 500 ns @ 24 MHz operation

• Standby functions

: Power-down mode (oscillator stop)

Activated by software or hardware; providing
ports with floating or active status
The software power-down stet mode is termi-
nated by interrupt signal enabling execution from
the interrupted address.

¡ Semiconductor

MSM80C154S/83C154S

CMOS 8-bit Microcontroller

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