TLC5902 Datasheet, PDF (7/22 Pages) Texas Instruments – LED DRIVER

TLC5902
LED DRIVER
BC_ENA ENABLE DCLK
L
X
X
X
H
X
X
L
↑
X
L
↑
X
L
↑
H
X
X
X
X
X
H
X
X
SLLS382 – DECEMBER 1999
RSEL
X
X
H
L
L
H
L
X
LATCH
X
X
X
X
X
H
H
L
Function Tables
Truth Table (Data)
MODE
DOUT0 – DOUT7
X No change
X No change
X
Shift register for
brightness control
Data for shift register
H before 16 bytes (written
before 16 times)
Shift register for gray
L scale before 8 bytes
(written before 8 times)
X No change
X No change
X No change
OPERATION/FUNCTION
Data latch for brightness control is set to 1Fh.
Data transfer for gray scale and brightness
control does not occur.
Data of DIN0 to DIN7 is clocked into the shift
register for brightness control.
Data of DIN0 to DIN7 is clocked into the first byte
of the shift register for gray scale data.
Data of DIN0 to DIN7 is clocked into the first byte
of the shift register for gray scale data.
Shift register for brightness control goes through
data latch for brightness control.
Shift register for gray scale goes through data
latch for gray scale.
The value for the shift register selected by RSEL
is latched.
BLANK GSCLK
H
X
L
↓
L
↓
L
X
L
X
L
X
L
X
MODE
X
H
L
X
X
X
X
WDT
X
X
X
CLK
CLK
CLK
X
Truth Table (Display/Protection)
WD_CAP TS_ENA
OUT0~15
OPERATION/
DOWN _FUNCTION
X
X
Off
Hi–Z
16 bits operation mode. The output is turned on if
all the gray scale data is not zero on the falling edge
X
X
of GCLK after the next rising edge of GCLK when
BLANK goes from high to low. Each output turns off
Hi–Z
on the falling edge of GSCLK, corresponding to
each gray scale data.
8 bits operation mode. The output is turned on if all
the gray scale data is not zero on the falling edge
X
X
of GCLK after the next rising edge of GCLK when
BLANK goes from high to low. Each output turns off
Hi–Z
on the falling edge of GSCLK corresponding to
each gray scale data.
capacitor
X
Turn off if the level of WDT is not changed within
time set by capacitor connected to WD_CAP.
L
Recover when
the level of
WDT changes.
L
X
WDT function is disabled.
Hi–Z
H
X
WDT function is disabled.
Hi–Z
X
H
Turn off if junction temperature exceeds the limit.
L
Set TS_ENA to
low for recovery
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