DM164 datasheet(5/30 Pages) SITI

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點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

DM164

8x3-CHANNEL CONSTANT CURRENT LED DRIVERS

Version:A.002

Page 4

PIN NAME

FUNCTION

QFN48 / LQFP48

pin number

VDD1,VDD2 Power supply terminal.

16,45

VSS1~4

Ground terminal.

18,19,42,43

REXT_R

REXT_G

REXT_B

External resistor connected between REXT and GND

for driver current setting.

REXT_R controls outputs:

IOUT0, 3, 6, 9, 12, 15, 18, 21.

REXT_G controls outputs:

IOUT1, 4, 7, 10, 13, 16, 19, 22.

REXT_B controls outputs:

IOUT2, 5, 8, 11, 14, 17, 20, 23.

IOUT0~11

LED driver outputs.

12,11,10,9,8,7,

6,5,4,3,2,1

IOUT12~23

LED driver outputs.

36,35,34,33,32,31

30,29,28,27,26,25

DIN

Serial input for grayscale PWM data and current

adjustment data.

DOUT

Serial output for grayscale PWM data and current

adjustment data.

DCK

Synchronous clock input for serial data transfer. The

input data of DIN can be transferred at either the rising

edges of DCK or the falling edges of DCK depending

on the signal DCKPH.

DCKO

Synchronous clock output for serial data transfer.

DCKO

= DCK .

DCKPH

When DCKPH = L, input data is shifted in by rising

edge of DCK,

When DCKPH = H, input data is shifted in by falling

edge of DCK

DOUTPH

When DOUTPH = H, DOUT is shifted out with half

DCK cycle delay

When DOUTPH = L, DOUT is shifted out without delay

LTH

Data latch input pin.

When DCKPH=L & LTH=H or DCKPH=H & LTH=L,

internal latches become transparent and PWM counter

value will be set to FFFF(h).

When DCKPH=L & LTH=L or DCKPH=H & LTH=H,

internal latches hold data.

LTHO

Data latch output pin. LTHO

= LTH

GCK

Clock input for PWM operation. When DCKPH=L

(DCKPH=H), the internal PWM counter will count up

with rising (falling) edge of GCK.

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