MSM64P155 Datasheet, PDF (1/29 Pages) OKI electronic componets – 4-Bit Microcontroller with Built-in LCD Driver and Melody Circuit

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MSM64P155/64P155L
4-Bit Microcontroller with Built-in LCD Driver and Melody Circuit
GENERAL DESCRIPTION
The MSM64P155 (1.5 V)/64P155L (3.0 V) is a one-time-programmable ROM version product,
which has one-time PROM (OTP) as internal program memory. On the other hand, the
MSM64155 is a mask ROM-version product, which has mask ROM as internal program memory.
Unlike the mask ROM-version MSM64155 which has a P-well CMOS structure, the MSM64P155/
64P155L has been fabricated with the N-well CMOS-structured EPROM process technology.
Therefore, the MSM64P155/64P155L differs from the MSM64155 in the polarity of the power
supply for LCD bias generation and in the external circuit structure.
Unlike the mask ROM-version product, the MSM64P155/64P155L cannot be supplied in the
form of a chip. The MSM64P155/64P155L is an OTP-version product used to evaluate an
application program.
The MSM64P155/64P155L has two operation modes, microcontroller operation mode and
PROM mode. The microcontroller operation mode is used to operate the MSM64P155/64P155L
like a mask ROM-version product and the PROM mode is used to program or read the PROM.
FEATURES
• Operating range
Operating voltage (mask option) : 1.5 V/3.0 V
Operating frequency
: 32.768 kHz crystal oscillation
Approx. 32 kHz RC oscillation
• Minimum instruction execution time : 91 ms
• General memory space
: 4064 bytes (PROM)
• Local memory space
: 256 nibbles
• LCD driver
: 64
Common driver ¥ 4
Segment driver ¥ 60
1/4 duty, 1/3 bias; 240 segments (60 ¥ 4)
1/3 duty, 1/3 bias; 180 segments (60 ¥ 3)
• I/O port
Input-output port
: 2 ports ¥ 4 bits (open-drain output/CMOS output
selectable; pull-down resistor input/high-impedance
input selectable)
Input port
: 1 port ¥ 2 bits (pull-down resistor input/high-impedance
input selectable)
1 port ¥ 4 bits (pull-down resistor input/high-impedance
input selectable)
Output port
: 1 port ¥ 4 bits (CMOS output)
• Event counter
: 1 channel
• Melody output
:2
• Capture circuits
: 2 channels
256 Hz, 128 Hz, 64 Hz, 32 Hz
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