點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

SP-VM148

Version

：001

Page

：8

Table

MSB

LSB

Serial Data Bits

7

6

5

4

3

2

1

0

7

6

5

4

3

2

1

0

Input Register

R15 R14 R13 R12 R11 R10 R09 R08 R07 R06 R05 R04 R03 R02 R01 R00

Function

SPD X

D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

X

X

X

X

X denotes “Don’t care/Unused”.

Regarding to all kinds of IC operation situations please refers to following table.

PD

SPD

IC status

High

-

Power off

Low

IC Active

Low

High

Soft power off

The PD pin is the power off pin of 11-VM148. Logic low level (PD = Low) is for IC

operation. On the other hand, its logic high level (PD = High) puts the chip into power off

mode for power saving. It is recommended to keep PD at high level (PD = H) before while

the chip is no operation to save power, especially for applications in portable devices.