LH1684F 查看數據表（PDF） - Sharp Electronics

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产品描述 (功能)

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LH1684F

5 V Drive 240 Outputs TFT-LCD Source Driver

Sharp Electronics 

SHARP

Description

of Functions

and Operations

1 Functions of pin

Pin symbol

vcc

GND

TST

TSTl to TST4

TST5

SP

CK

CTR

SAM

i-

RL

CSl, cs2

Pin functions

Used as power supply pin, which is normally connected to +5.6 V.

/ Used as GND pin, which is connected to OV.

: Used as pin for LSI testing. Must be connected to VCC.

I Used as pins for LSI testing. Must be connected to VCC.

: Used as pin for LSI testing. Must be connected to GND.

j Used as input pin of horizontal scanning start pulse.

j Used as input pin of horizontal shift clock.

/ Video signals are sampled in order at rise timing and fall timinglof CK.

i Used as input pin of selecting video signals sampling circuits and selecting input

/ signals of output operational amplifiers.

Used as input pin for setting the selecting of normal sampling operation or S-point

j simultaneous sampling operation.

i For normal sampling operation, video signals are sampled in order 7 LCD drive output.

For 3-point simultaneous sampling operation, video signals are sampled in order

I simultaneously 3 LCD drive outputs.

j For either operation, sampling signals are shifted at every rise timing and fall timing of

j horfzontal shift clock of CK pin (half cfock) , and their sampling perfod is equal to the

period of one clock.

Used as input pin for setting the shift direction of video signals sampling sequence.

~Video signals are sampled in the order of from OS1 to OS240 when set to “H” and in tht

order of from OS.240 to OS1 when set to “L”.

1Used as input pins for setting of chip cascade sequence.

/ Set chip cascade sequence as shown in the table below.

’ Cascadesequence ’ cs1

cs2

I

1st

HI H

2nd

I L!H

3rd

I

H

;

L

I

4th

/LjL

; For details, refer to “6-2. Operation of function” on page 7.

MODE

’ Used as input pin for setting form of video signals for sampling.

/ By mode setting circuit, video signals are sampled and output with respect to OS1 to

i OS246 in the order of VB, VA, and VC when set to “H” and in the order of VC, VB, and

VA when set to ‘IL”.

/ For details, refer to “6-2. Operation of function” on page 7.

1Do not use this function in “OPEN” condition.

Vbl

Vb2

VA, VB, VC

r Used as pin for setting the bias voltage of operational amplifiers in output circuits.

i Used as pin for setting bias voltage of buffers in output circuits.

Used as input pins of video signals.

/ VB, VA, VC, ._. VB. VA, VC or VC, VB, VA. . .. VC, VB, VA are input with respect to LCD

; drive outputs OSl, OS2,OS3. ... 08238,05239,OS240

by MODE pin setting

1condition.

OS1 to OS240

j Used as LCD drive output pins.

i All output pins discharge simultaneously at the timing of internal

; after discharge is completed, they output voltage corresponding

: signals.

discharge

signal and

to sampled video

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