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Previous version: Mar. 1996
Operatable at 0.9 V and Built-in Buzzer Circuit 4-Bit Microcontroller
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
www.DataShepeto4Urt.,coambuzzer 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.
• The IC can be initialized and operated even at a low voltage of 0.9 V.
• Low power consumption
: 4096 words ¥ 17 bits (MSM6545/6545L)
2048 words ¥ 17 bits (MSM6575/6575L)
: 256 words ¥ 4 bits (MSM6545/6545L)
128 words ¥ 4 bits (MSM6575/6575L)
• I/O port
: 7 ports ¥ 4 bits
: 1 port ¥ 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-¥¥GS-K)
44-pin plastic QFP (QFP44-P-910-0.80-2K) : (Product name : MSM6545/6545L-¥¥GS-2K)
44-pin plastic QFP (QFP44-P-910-0.80-K) : (Product name : MSM6575/6575L-¥¥GS-K)
44-pin plastic QFP (QFP44-P-910-0.80-2K) : (Product name : MSM6575/6575L-¥¥GS-2K)
¥¥ indicates a code number.