TLC5949 Datasheet, PDF (38/51 Pages) Texas Instruments – 16-Channel, 12-Bit, ES-PWM, Full Self-Diagnosis LED Driver for 7-Bit Global BC LED Lamp

TLC5949
SBVS219A – DECEMBER 2012 – REVISED DECEMBER 2012
TMGRST Bit
in Control Data Latch
(Internal)
BLANK Bit
in Control Data Latch
(Internal)
Unknown
'1'
'1'
'0'
1 23 4 5
16 17 18 19 20
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Internal BLANK is generated when the LAT
signal is input because display timing reset is enabled.
4093 4095
4094 4096
1 23 4 5
OUTn Current
for PWM Control
(GSDATA = FFFh)
OUTn Current for IDM
0 mA
0 mA
Programmed
Output Current
2 mA, 10 mA, 20 mA,
or 1 mA
(2)
(3)
LOD and LSD Data Latch
(Internal)
LOD and LSD Old Data
(1)
0 mA
0 mA
LOD and LSD data latch updated with latest
data at the clock time selected by LATTMG bit.
LOD
XXXh
2 mA, 10 mA, 20 mA
LOD
XXXh
16-Bit LOD and LSD
Circuit Output Data
(Internal)
LOD, LSD
000h
Control data write
latch signal.
LAT
LOD
XXXh
LOD
XXXh
LOD
XXXh
LOD data are not stable immediately after OUTn turn on.
LOD
000h
LOD
XXXh
GS data write latch signal.
193-Bit Common Shift
Register Data
(Internal)
Control Data
GS Data
(1) Set the current with the external resistor and BC data.
(2) Select the output current with the IDMCUR bit in the control data latch.
(3) Select clock time with the LATTMG bit in the control data latch.
Figure 32. PWM Operation Timing
SID Loaded Into Common Shift Register
38
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