MSM64P155 datasheet(6/29 Pages) OKI

Part #	MSM64P155

Description	4-Bit Microcontroller with Built-in LCD Driver and Melody Circuit

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Manufacturer	OKI [OKI electronic componets]

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MSM64P155/64P155L

¡ Semiconductor

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Basic Functions (continued)

I

Ports

4-bit input port (port 2) :

Select between pull-down resistor input and high impedance input

for each bit with the port 2 control register (P2CON).

When configured for secondary functions, an external interrupt and

capture circuit trigger input are allocated.

If P2.0 to P2.3 are set to "H" level, the device enters system reset

mode.

8

7

6

10

9

I

2-bit input port (port 3) :

Select between pull-down resistor input and high impedance input

with the port 3 control register (P3CON).

When configured for a secondary function, an external interrupt is

allocated to P3.0 and an event counter is allocated to P3.1.

5

O

4-bit output port (port 4) :

4-bit CMOS output port.

14

13

12

11

I/O

4-bit input-output port (port 6) :

Select between input and output, between pull-down resistor input

and high impedance input, and between open-drain output and CMOS

output with the port 6 control register (P6CON). When configured

for a secondary function, an external interrupt is allocated.

18

17

16

15

I/O

4-bit input-output port (port 7) :

Select between input and output, between pull-down resistor input

and high impedance input, and between open-drain output and CMOS

output with the port 7 control register (P7CON). When configured for

a secondary function, an external interrupt is allocated.

22

21

19

Melody

Drivers

O

Output pin of melody driver 0.

25

O

Inverted output pin of MD0 output.

24

O

Output pin of melody driver 1.

26

O

Inverted output pin of MD1 output.

27

O

LCD common signal output pins.

95

94

93

92

LCD

Drivers

O

Description

Type

Function

P2.0

P2.1

P2.2

P3.0

P3.1

P2.3

P4.0

P4.1

P4.2

P4.3

P6.0

P6.1

P6.2

P6.3

P7.0

P7.1

P7.3

MD0

MD1

COM1

COM2

COM3

COM4

Symbol

20

P7.2

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