MSM6545L Datasheet | OKI Electric

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 ponents, 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 - 17 bits (MSM6545/6545L) 2048 words - 17 bits (MSM6575/6575L) - RAM : 256 words - 4 bits (MSM6545/6545L) 128 words - 4 bits (MSM6575/6575L) - I/O port Input-output port : 7 ports - 4 bits Input port : 1 port - 4 bits - Interrupt functions (real-time interrupt, external interrupt, and serial interrupt) - Serial I/O port : 8-bit sync munication - 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 k Hz 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) Chip - - indicates a code number. 1/13 .. CCLK BU/D 4-Bit BCD COUNTER CCNT PGCONH PGCONL PORT7 BLOCK DIAGRAM ¡ Semiconductor P7.3 P7.2 P7.1 P7.0 D-BUS SCND0 SERIAL I/O S-bus FLAG P6.3 P6.2 P6.1...