TLC5942 Datasheet, PDF (8/33 Pages) Texas Instruments – 16-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction

TLC5942
SBVS096B – OCTOBER 2007 – REVISED OCTOBER 2007
www.ti.com
TERMINAL
NAME
PWP
GSSIN
5
RHB
2
GSSCLK
4
1
XGSLAT
6
3
GSSOUT
24
23
DCSIN
3
32
DCSCLK
2
31
XDCLAT
26
25
DCSOUT
25
24
BLANK
23
22
IREF
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
VCC
GND
NC
27
26
14
11
13
10
12
9
11
8
10
7
9
6
8
5
7
4
15
14
16
15
17
16
18
17
19
18
20
19
21
20
22
21
28
27
1
30
—
12, 13,
28, 29
TERMINAL FUNCTIONS
I/O
DESCRIPTION
I Serial data input for grayscale.
Serial data shift clock for grayscale and reference clock for Grayscale PWM control. Data present
on the GSSIN pin are shifted into the Grayscale Shift Register with each rising edge of the
I GSSCLK pin. Data are shifted into the LSB of the register with each rising edge. The MSB of the
register is shifted to the GSSOUT pin with each rising edge. If BLANK is low, then each rising
edge of GSSCLK increments the grayscale counter for PWM control.
I
Data in the shift register are moved to the grayscale data latch with a low-to-high transition of this
pin.
O
Serial data output for Grayscale/Status information data. This signal is connected to MSB of
Grayscale Shift Register.
I Serial data input for Dot Correction.
Serial data shift clock for dot correction. Data present on the DCSIN pin are shifted into the dot
I
correction shift register with each rising edge of the DCSCLK pin. Data are shifted into the LSB of
the register with each rising edge. The MSB of the register is shifted to the DCSOUT pin with
each rising edge.
I
Data in the shift register are moved to the dot correction data latch with a low-to-high transition of
this pin.
O
Serial data output for dot correction. This signal is connected to the MSB of the Dot Correction
Shift Register.
Blank (all constant current outputs off). When BLANK is high, all constant current outputs (OUT0
I
through OUT15) are forced off, the Grayscale counter is reset to '0', and the Grayscale PWM
timing controller is initialized. When BLANK is low, all constant current outputs are controlled by
the Grayscale PWM timing controller.
I/O
Constant current value setting. OUT0 through OUT15 sink constant current is set to desired
value by connecting an external resistor between IREF and GND.
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
O Constant current output
— Power-supply voltage
— Power ground
— No internal connection
8
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