GENERAL DESCRIPTION

MSM6545/6575/6545L/6575L is a 4-bit, low-power microcontroller manufactured in a CMOS silicon gate process. The microcontroller can be initialized and operated at a low supply voltage of 0.9 V.

This single device contains a crystal oscillator circuit, voltage converter circuits, a time base counter, a ROM, a RAM, a stack RAM, I/O ports, interrupt function components, a serial I/O port, a buzzer output circuit, and an updown counter.

This IC is driven by one battery and is well suited to products that need to be operated under low power consumption.

FEATURES

• The IC can be initialized and operated even at a low voltage of 0.9 V.

• Low power consumption

• ROM : 4096 words x 17 bits (MSM6545/6545L)

2048 words x 17 bits (MSM6575/6575L)

• RAM : 256 words x 4 bits (MSM6545/6545L)

128 words x 4 bits (MSM6575/6575L)

• I/O port

Input-output port : 7 ports x 4 bits

Input port : 1 port x 4 bits

• Interrupt functions (real-time interrupt, external interrupt, and serial interrupt)

• Serial I/O port : 8-bit sync communication

• Buzzer output circuit

• 4-bit decimal updown counter

• 73 instructions

• Minimum instruction execution time : 61 ms

• Operation under single 1.5 V power supply (MSM6545/6575)

A mask option allows the 3 V power supply to be used (MSM6545L/6575L)

• Built-in 32.768 kHz crystal oscillator circuit

• Package options:

44-pin plastic QFP (QFP44-P-910-0.80-K) : (Product name : MSM6545/6545L-xxGS-K)

44-pin plastic QFP (QFP44-P-910-0.80-2K) : (Product name : MSM6545/6545L-xxGS-2K)

44-pin plastic QFP (QFP44-P-910-0.80-K) : (Product name : MSM6575/6575L-xxGS-K)

44-pin plastic QFP (QFP44-P-910-0.80-2K) : (Product name : MSM6575/6575L-xxGS-2K)

Chip

xx indicates a code number.