ST7549T
Pin Name
V0, V1, V2, V3, V4
I/O
Power
Supply
Description
This is a multi-level power supply for the liquid crystal.
VOUTIN ≥V0 ≥V1≥V2≥V3≥V4≥VSS
VRS
Power
Supply
Monitor Voltage Regulator level, must be left open.
No. of Pins
5
1
Configuration Pins
Pin Name
CP
BR
Test Pin
Pin Name
T0~T11
I/O
Description
No. of Pins
Set Booster stages. (VSS=4X;VDD=5X)
I
CP pin set the default value of booster stages after reset , and booster
1
stage can be changed by software instruction
Set LCD bias ratio. (VSS=1/7;VDD=1/9)
I
BR pin set the default value of bias ratio after reset , and bias ratio can
1
be changed by software instruction
I/O
Description
T0~T7 must floating
T
T8.T9.T10 must connect to VDD
T11 must connect to VSS
No. of Pins
10
ST7549T I/O PIN ITO Resister Limitation
PIN Name
PS[2:0],OSC,CP,BR,T8~T11
T0~T7,VRS, V1 , V2 , V3 , V4
VDD1 , VDD2 , VSS , VOUTIN , VOUTOUT ; D1~D3 (if I2C mode)
V0
A0,/WR,/RD,CSB, D0 …D7
RESB
ITO Resister
No Limitation
Floating
<100Ω
<500Ω
<1KΩ
<10KΩ
Ver 1.3
11/52
2005/12/06