TLC5930PWPR Datasheet, PDF (31/40 Pages) Texas Instruments – 12-CHANNEL LED DRIVER

TLC5930
PRINCIPLES OF OPERATION
SLLS528 – MARCH 2002
HSYNC synchronization
The constant-current output is turned on, synchronizing with this packet. In addition, for common IDs, the failure
monitor information flag is read out through the 5 LSB of DATA within the packet (see failure monitor information
read section), and data written in the internal register within gray scale data setting packet, plane brightness
adjustment data setting packet, dot correction data setting packet, color tone correction setting packet, and color
tone correction control setting packet are latched, depending on the status of the register latch flag of 5 MSB
of DATA. Since each flag in the register latch flag is independent, writing a 1 allows the respective packet data
to be latched. Writing a 0 to the flag allows no latch. By using this function, gray scale data, plane brightness
adjustemnt data , dot correction data, color–tone correction, and correction control setting packets can be sent
asynchronously with the HSYNC cycle.
Note that no lighting-ON occurs when the gray-scale clock is entered before this HSYNC packet of normal
lighting-ON operation (including use of internally generated clock) during the first normal lighting-ON operation
(PWM operation) after power up. Normal operation occurs after the second operation.
Table 18. Packet Configuration (32-bit)
ID (Bin)
00000000
CMD (Bin)
10000000
REGISTER LATCH FLAG
MSB
GSL BCL DCL CCL CSL
DATA
RESERVED
FAILURE MONITOR FLAG
LSB
OVMFA HEF GEF TEF AWC
REFER FAILURE MONITOR READ
1
LATCH COLOR TONE
CORRECTION CONTROL DATA
1
LATCH COLOR TONE CORRECTION DATA
1
LATCH DOT CORRECTION DATA
1
LATCH PLANE BRIGHTNESS ADJUSTMENT DATA
1
LATCH GRAY SCALE DATA
0
0
0
0
0
(0080xxh.PACKET SENT FORM CONTROLLER)
NO LATCH
UDG–02044
Table 21 shows the relationship between failure monitor information reading packet, HSYNC packet, and other
various error flags.
TIME
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _FAIL
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _OVMFA
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^HEF
GEF
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _TEF
OCCUR
FAILURE
PACKET
1
0
0
1
Table 19. Error Flag Relationships
HSYNC
PACKET
1
1
1
1
FAIL
RELEASE
FAILURE
PACKET
0
1
1
0
HSYNC
PACKET
0
0
0
0
FAIL
OCCUR
HSYNC
PACKET
1
1
1
1
FAILURE
PACKET
1
1
1
1
FAIL
RELEASE
HSYNC
PACKET
0
0
0
0
FAILURE
PACKET
0
0
0
0
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