TLC5930PWPR Datasheet, PDF (29/40 Pages) Texas Instruments – 12-CHANNEL LED DRIVER

TLC5930
PRINCIPLES OF OPERATION
SLLS528 – MARCH 2002
failure monitor information read (continued)
TEF function (thermal error flag)
This function, is used to determine when the junction temperature of the device exceeds its limit. This function
sets 0 to the TEF flag if the junction temperature is less than 160_C, and set it to 1 if the temperature is greater
than 160_C.
AWC function (active wire check)
This function is used to check that the communication between controller and driver is performing normally. The
TLC5930 clocks out the inverted data from written data into bits when this packet is entered. For individual IDs,
the inverted data from the controller output returns to the controller. For common IDs, the same data as the
controller output returns to the controller if the number of devices connected in series is even, but returns to the
inverted data if it is odd.
read information output
For failure monitor information reading (including OVM information reading, failure monitor information flags in
the HSYNC packet), for individual IDs or common IDs, it is set to 1 if an error is indicated. Input data is passed
through if there is no error detected. For AWC, for both individual and common IDs, the inverted data from input
data is clocked out. When the ID is neither common nor matched, the data including AWC is passed through.
Table 16 shows four connected device. Bold bits indicates the reading information output from the device.
Table 14. Read Information Output
DEVICE NUMBER
IC1 INPUT (CONTROLLER OUTPUT)
IC1 OUTPUT (IC2 INPUT)
IC2OUTPUT (IC3 INPUT)
IC3 OUTPUT (IC4 INPUT)
IC4 OUTPUT (CONTROLLER INPUT)
CONDITION
IC1: OVM fail
IC2: ALL PASS
IC3: HEF, GEF fail
IC4: ALL PASS
ID
NO.
COMM
ON
DATA BIT 111111111122222222223333
.123456789012345678901234567890123
x000000000110000000000000xxxxxxxxx
xxx000000000110000000010001xxxxxxx
xxxxx000000000110000000010000xxxxx
xxxxxxx000000000110000000011101xxx
xxxxxxxxx000000000110000000011100x
DEVICE
ID
DATA BIT 111111111122222222223333
ID
DATA BIT 111111111122222222223333
NUMBER NO.
.123456789012345678901234567890123
NO.
.123456789012345678901234567890123
IC1 INPUT
x000000010110000000000000xxxxxxxxx
x000000100110000000000000xxxxxxxxx
IC1 OUTPUT
xxx000000010110000000010001xxxxxxx
xxx000000100110000000000000xxxxxxx
IC2 OUTPUT 1
xxxxx000000010110000000010001xxxxx
2
xxxxx000000100110000000000001xxxxx
IC3 OUTPUT
xxxxxxx000000010110000000010001xxx
xxxxxxx000000100110000000000001xxx
IC4 OUTPUT
xxxxxxxxx000000010110000000010001x
xxxxxxxxx000000100110000000000001x
DEVICE
ID
DATA BIT 111111111122222222223333
ID
DATA BIT 111111111122222222223333
NUMBER NO.
.123456789012345678901234567890123
NO.
.123456789012345678901234567890123
IC1 INPUT
IC1 OUTPUT
IC2 OUTPUT 3
IC3 OUTPUT
IC4 OUTPUT
x000000110110000000000000xxxxxxxxx
xxx000000110110000000000000xxxxxxx
xxxxx000000110110000000000000xxxxx
xxxxxxx000000110110000000001101xxx
xxxxxxxxx000000110110000000001101x
x000001000110000000000000xxxxxxxxx
xxx000001000110000000000000xxxxxxx
4
xxxxx000001000110000000000000xxxxx
xxxxxxx000001000110000000000000xxx
xxxxxxxxx000001000110000000000001x
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