M34551 查看數據表（PDF） - MITSUBISHI ELECTRIC

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M34551

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

4551 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for

INFRARED REMOTE CONTROL TRANSMITTER

CONTROL REGISTERS (CONTINUED)

LCD control register L1

at reset : 00002

at power down : state retained

R/W

L13 Not used

L12 LCD on/off bit

L11

LCD duty and bias selection bits

L10

0

1 This bit has no function, but read/write is enabled

0 Off

1 On

L11 L10

Duty

Bias

00

Not available

01

1/2

1/2

10

1/3

1/3

11

1/4

1/3

LCD control register L2

L23 P23/SEG19 pin function switch bit

L22 P22/SEG18 pin function switch bit

L21 P21/SEG17 pin function switch bit

L20 P20/SEG16 pin function switch bit

at reset : 11112

0 SEG19

1 P23

0 SEG18

1 P22

0 SEG17

1 P21

0 SEG16

1 P20

at power down : state retained

W

General-purpose register V2

at reset : 00002

at power down : 00002

R/W

4-bit general-purpose register.

The data transfer between register A and this register is performed with the TV2A and TAV2 instructions.

Note: “R” represents read enabled, and “W” represents write enabled.

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