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

? Interrupt sources :

10 sources

External 4, time base 4, melody 2

(When TST3 = 1, six time base sources)

? Clock generation circuit (mask option) : Crystal/RC oscillation

? Package:

100-pin plastic QFP (QFP100-P-1420-0.65-BK)

Product name :

MSM64P155-001GS-BK (crystal oscillation, 1.5 V, blanked PROM)

MSM64P155L-002GS-BK (crystal oscillation, 3.0 V, blanked PROM)

MSM64P155-003GS-BK (RC oscillation, 1.5 V, blanked PROM)

MSM64P155L-004GS-BK (RC oscillation, 3.0 V, blanked PROM)

MSM64P155-xxxGS-BK (crystal/RC oscillation, 1.5 V, written PROM)

MSM64P155L-xxxGS-BK (crystal/RC oscillation, 3.0 V, written PROM)

xxx indicates a code number.