TLC5929 Datasheet, PDF (17/36 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with 7-Bit Global Brightness Control, Power-Save Mode

TLC5929
www.ti.com
SBVS159 – APRIL 2011
REGISTER AND DATA LATCH CONFIGURATION
The TLC5929 has one common shift register and two control data latches. The common shift register is 17-bits
long and the two control data latches are 16-bits long. When the MSB of the common shift register is '0' and LAT
shows a rising edge, the lower 16 bits of the common shift register are copied into the output on/off data latch.
When the MSB is '1' and LAT shows a rising edge, the lower 16 bits are copied into the control data latch.
Figure 20 shows the configuration of the common shift register and the two control data latches.
SID 16 Bits
SOUT
Common Shift Register (17 Bits)
MSB
Latch Common Common Common Common Common
Select Data Bit Data Bit Data Bit Data Bit Data Bit
Bit
15
14
13
12
11
16
15
14
13
12
11
LSB
Common Common Common Common Common
Data Bit Data Bit Data Bit Data Bit Data Bit
4
3
2
1
0
4
3
2
1
0
SIN
SCLK
Lower 16 Bits
Output On/Off Data Latch (16 Bits)
MSB
OUTON OUTON OUTON OUTON OUTON
15
14
13
12
11
15
14
13
12
11
LSB
OUTON OUTON OUTON OUTON OUTON
4
3
2
1
0
4
3
2
1
0
16 Bits
To
Output On/Off
Control Circuit
This latch pulse
comes from the
LAT pin when the
MSB of the Common
Shift Register is ‘0’.
Control Data Latch (16 Bits)
16 Bits
MSB
Power- IDM IDM IDM
IDM
LSD LSD
SID
SID Brightness
Save Working Working Current Current Detect Detect Load Load Control
Enable Time 1 Time 0 Select 1 Select 0 Voltage 1 Voltage 0 Control 1 Control 0 (BC) 6
15
14
13
12
11
10
9
8
7
6
LSB
Brightness
Control
(BC) 0
0
This latch pulse
comes from the
LAT pin when the
MSB of the Common
Shift Register is ‘1’.
1 Bit
2 Bits
2 Bits
2 Bits
2 Bits
7 Bits
To
To
Power-Save
IDM
Mode
Working Time
Control Circuit Control Circuit
To
IDM
Current
Control Circuit
To
LSD
Circuit
To
SID
Data Load
Control Circuit
To
Output
Constant-Current
Control Circuit
Figure 20. Common Shift Register and Control Data Latches Configuration
Copyright © 2011, Texas Instruments Incorporated
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