LC75832E 查看數據表（PDF） - ON Semiconductor

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LC75832E

Static Drive, 1/2-Duty Drive General-Purpose LCD Driver

ON Semiconductor 

LC75832E, LC75832W

Display Control and the INH Pin

Since the IC's internal data (the display data D1 to D54 and the control data when in static drive mode, and the display

data D1 to D108 and the control data when in 1/2 duty drive mode) is undefined when power is first applied,

applications should set the INH pin low at the same time as power is applied to turn off the display (setting S1/P1 to

S4/P4 and S5 to S54, COM1, and COM2 to the VSS level) and during this period send serial data from the controller.

The controller should then set the INH pin high after the data transfer has completed. This procedure prevents

unnecessary display at power on (See Figures 4 to 7).

Notes on the Power On/Off Sequences

Applications should observe the following sequence when turning the LC75832E and LC75832W power on and off.

(See Figures 4 to 7):

• At power on: Logic block power supply (VDD) on  LCD driver block power supply (VLCD) on

• At power off: LCD driver block power supply (VLCD) off  Logic block power supply (VDD) off

However, if the logic and LCD driver block use a shared power supply, then power supplies can be turned on and off at

the same time.

• Static drive mode

t1

VDD

t2

t3

VLCD

INH

CE

D1 to D54,P0 to P2,

Internal data DT, FC0 to FC2,

OC, SC, BU

Display data and control data transferred

Undefined

VIL1

tc

VIL1

Defined

• Static drive mode (when in 822 mode data transfer)

t1

VDD

Figure 4

Undefined

Notes: t10

t2>0

t30 (t2>t3)

tc  10s min

t2

t3

VLCD

INH

CE

D1 to D23,

Internal data D25 to D54,

DT

Display data and control data transferred

Undefined

VIL1

tc

VIL1

Defined

Figure 5

Undefined

Notes: t10

t2>0

t30 (t2>t3)

tc  10s min

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