MSM64164C

• Operating range
   Operating frequencies : 32.768 kHz, 400 kHz
   Operating voltage : 1.25 to 1.7 V (1.5 V spec.)
                                  2.0 to 3.5 V (3 V spec.)
                                  2.2 to 3.5 V (3 V spec., 1/2 duty)
   Operating temperature : 40 to +85°C
• Memory space
   Internal program memory : 4064 bytes
   Internal data memory : 256 nibbles
• Minimum instruction execution time : 7.5 s @ 400 kHz
                                                           91.6 s @ 32.768 kHz
• RC oscillation type A/D converter : 2 channels
   Time dividing 2-channel method
• Serial port : Synchronous 8-bit transfer
• LCD driver : 34 outputs; duty ratio switchable by software
   (1) At 1/4 duty and 1/3 bias : 120 segments (max)
   (2) At 1/3 duty and 1/3 bias : 93 segments (max)
   (3) At 1/2 duty and 1/2 bias : 64 segments (max)
• Buzzer driver : 1 output (4 output modes selectable)
• Capture circuit : 2 channels
• Watchdog timer
• Clock : 32.768 kHz crystal oscillator and 400 kHz RC oscillator (with an external resistor)
   CPU clock : 32.768 kHz/400 kHz (switchable by software)
   Time base clock : 32.768 kHz
• Power supply voltage : 1.5 V/3 V (selectable by mask option)
• I/O port
   Input-output port : 3 ports * 4 bits
   Input port : 1 port * 4 bits
   Output port : 1 port * 4 bits
   (8 out of the 34 LCD driver outputs can be used as output-only ports by mask option.)
• Interrupt sources
   External interrupt : 2 sources
   Internal interrupt : 8 sources
• Package options:
   80-pin plastic QFP (QFP80-P-1420-0.80-BK) : (Product name : MSM64164C-***GS-BK)
   80-pin plastic QFP (QFP80-P-1414-0.65-K) : (Product name : MSM64164C-***GS-K)
   80-pin plastic TQFP (TQFP80-P-1212-0.50-K) : (Product name : MSM64164C-***TS-K)
                                                                   Chip : (Product name : MSM64164C-***)
                                                                                   *** indicates a code number.
• OTP version
  The MSM64P164 has one-time PROM (OTP) as internal program memory and is used to evaluate the software development.
   The MSM64P164 differs from the MSM64164C in the polarity of the power supply and operating voltage.
   Refer to the "MSM64P164 User's Manual" for details.

The MSM64164C is a low power 4-bit microcontroller that employs Oki's original CPU core nX-4/20.

The MSM64164C is best suitable for applications such as low power, high precision thermometers and hygrometers.

The MSM64P164 is a one-time-programmable ROM-version product having one-time PROM (OTP) as internal program memory.

The MSM64P164 is used to evaluate the software development.

The MSM64P164 differs from the MSM64164C in the polarity of the power supply.