UPD16488AP datasheet(53/91 Pages) NEC

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Data Sheet S15745EJ2V0DS

µµµµPD16488A

5.9

Reset

In the

µPD16488A, a reset is executed when the /RES input is at low level or when a reset command is entered. The IC

is reset to its default settings. These default settings are listed in the table below.

Number

/RES

Reset Command

Control register 1

Enabled (DISP flag only)

Enabled

Control register 2

Enabled (IDIS flag only)

X address register

Disabled

Y address register

Duty setting register

EnabledNote2

AC driver inversion cycle register

AC driver inversion position shift register

Enabled

Partial AC driver inversion cycle register

Partial AC driver inversion position shift register

Partial display mode setting register

R10

Display memory access register Note1

R11

Disabled

Display start line setting register

R12

Enabled

Blink X address register

R13

Blink start line address register

R14

Blink end line address register

R15

Blink data memory access register Note1

R16

Disabled

Inverted X address register

R17

Enabled

Inversion start line address register

R18

Inversion end line address register

R19

Inverted data memory access register Note1

R20

Disabled

Partial start line address register

R21

Enabled

Gray scale data register 1 (0, 0)

R23

Gray scale data register 2 (0, 1)

R24

Gray scale data register 3 (1, 0)

R25

Gray scale data register 4 (1, 1)

R26

Partial gray scale data register 1 (0, 0)

R27

Partial gray scale data register 2 (0, 1)

R28

Partial gray scale data register 3 (1, 0)

R29

Partial gray scale data register 4 (1, 1)

R30

Power system control register 1

R32

Power system control register 2

R33

Power system control register 3

R34

Electronic volume register

R35

Partial electronic volume register

R36

Boost adjustment register

R37

RAM test mode setting register

R44

Signature read register

R45

Disabled

Enabled: Default value is input, Disabled: Default value is not input

Notes 1. When using the /RES pin to reset, the contents of memory are not retained. Use the reset command to reset

if the memory contents need to be retained.

2. Be sure to set this register again after input the reset command.

Cautions 1. Using the /RES pin to reset initializes the shift clock counter.

2. Always input the reset command as the first command after power ON.

UPD16488AP Datasheet(PDF) 53 Page - NEC

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