TLC59291_16 Datasheet, PDF (32/46 Pages) Texas Instruments – 8/16-Channel, Constant Current LED Driver

TLC59291
SLVSA96A – SEPTEMBER 2015 – REVISED MARCH 2016
www.ti.com
Register Maps (continued)
8.5.1.1 Common Shift Register
The 16-bit common shift register is used to shift data from the SIN pin into the TLC59291. The data shifted into
the register are used for the data writing for output on-off control, global brightness control, and some functions
control. The register LSB is connected to SIN. On each SCLK rising edge, the data on SIN are shifted into the
register LSB and all bits are shifted towards the MSB.
SOUT can be connected to either bit 15 or bit 7 of common shift register depending on BLANK signal and control
data setting.
Also Status Information Data (SID) selected by the load select data in the control data latch are loaded to the
common shift register when LAT rising edge is input with SCLK is “0” of the shift register.
When the device powered up, the data in the 16-bit common shift register is set to all “0”.
8.5.1.2 Output On/Off Data Latch
The output on/off data latch is 16 bits long and sets the on or off status for each constant-current output.
When FC[9] = 1 and BLANK is high, all outputs are forced off. But then the data in the latch are not changed. In
other case, the corresponding output is turned on if the data in the output on-off data latch are '1' and remains off
if the data are '0'.
When the IC is initially powered on, the data in the data latch is set to all “0”.
The output on/off data latch configuration is shown in Figure 32 and the data bit assignment is shown in Table 6.
From common shift register
Output on-off data latch (16 bits)
16 bit
MSB
15
14
13
12
11
---
OUTON OUTON OUTON _{OUTON OUTON}
15
14
13
12
11
4
3
2
LSB
1
0
OUTON OUTON OUTON OUTON OUTON
4
3
2
1
0
16 bit
To output on off control circuit
Figure 32. Output On/Off Data Latch Configuration
Table 6. On/Off Control Data Latch Bit Assignment
BIT NUMBER
0
1
2
∙∙∙
13
14
15
BIT NAME
OUTON0
OUTON1
OUTON2
∙∙∙
OUTON13
OUTON14
OUTON15
CONTROLLED CHANNEL
OUT0
OUT1
OUT2
∙∙∙
OUT13
OUT14
OUT15
32
Submit Documentation Feedback
Product Folder Links: TLC59291
Copyright © 2015–2016, Texas Instruments Incorporated