TLC59711 Datasheet, PDF (18/36 Pages) Texas Instruments – 12-Channel, 16-Bit, Enhanced Spectrum PWM, RGB, LED Driver

TLC59711
SBVS181 – OCTOBER 2011
www.ti.com
ENHANCED SPECTRUM (ES) PWM CONTROL
Enhanced spectrum (ES) PWM has the total display period divided into 128 display segments. The total display
period refers the period between the first grayscale clock input to the 65536th grayscale clock input after BLANK
(bit 213) is set to '0'. Each display period has 512 grayscale values, maximum. Each output on-time changes
depending on the grayscale data. Refer to Table 4 for sequence information and Figure 22 for timing information.
Table 4. ES-PWM Drive Turn-On Time Length
GS DATA (dec) GS DATA (hex) OUTn DRIVER OPERATION
0
0000h
Does not turn on
1
0001h
Turns on during one GS clock period in the 1st display period
2
0002h
Turns on during one GS clock period in the 1st and 65th display period
3
0003h
Turns on during one GS clock period in the 1st, 33rd, and 65th display period
4
0004h
Turns on during one GS clock period in the 1st, 33rd, 65th, and 97th display period
5
0005h
Turns on during one GS clock period in the 1st, 17th, 33rd, 65th, and 97th display period
6
0006h
Turns on during one GS clock period in the 1st, 17th, 33rd, 65th, 81st, and 97th display period
The number of display periods that OUTXn is turned on during one GS clock is incremented by the GS
data increasing in the following order. The order of display periods that the output turns on are:
1, 65, 33, 97, 17, 81, 49, 113, 9, 73, 41, 105, 25, 89, 57, 121, 5, 69, 37, 101, 21, 85, 53, 117, 13, 77,
—
—
45, 109, 29, 93, 61, 125, 3, 67, 35, 99, 19, 83, 51, 115, 11, 75, 43, 107, 27, 91, 59, 123, 7, 71, 39, 103,
23, 87, 55, 119, 15, 79, 47, 111, 31, 95, 63, 127, 2, 66, 34, 98, 18, 82, 50, 114, 10, 74, 42, 106, 26, 90,
58, 122, 6, 70, 38, 102, 22, 86, 54, 118, 14, 78, 46, 110, 30, 94, 62, 126, 4, 68, 36, 100, 20, 84, 52,
116, 12, 76, 44, 108, 28, 92, 60, 124, 8, 72, 40, 104, 24, 88, 56, 120, 16, 80, 48, 112, 32, 96, 64, and
128.
127
007Fh
Turns on during one GS clock period in the 1st to 127th display period, but does not turn on in the
128th display period
128
0080h
Turns on during one GS clock period in all display periods (1st to 128th)
129
0081h
Turns on during two GS clock periods in the 1st display period and one GS clock period in the next
display period
—
—
The number of display periods where OUTn is turned on for two GS clocks is incremented by the
increased GS data similar to the previous case where the GS value is 1 trough 127
255
00FFh
Turns on during two GS clock periods in the 1st to 127th display period, but only turns on during one
GS clock period in the 128th display period
256
0100h
Turns on during two GS clock periods in all display periods (1st to 128th)
257
0101h
Turns on during three GS clock periods in the 1st display period and two GS clock periods in the next
display period
—
—
Display periods with OUTn turned on is incremented by the increased GS datasimilar to 0101h
operation
65478
FEFFh
Turns on during 511 GS clock periods in the 1st to 127th display period, but only turns on 510 GS
clock periods in the 128th display period
65280
FF00h
Turns on during 511 GS clock periods in all display periods (1st to 128th)
65281
FF01h
Turns on during 512 GS clock periods in the 1st display period and 511 GS clock periods in the 2nd to
128th display periods
—
—
—
65534
FFFEh
Turns on during 512 GS clock periods in the 1st to 63th and 65th to 127th display periods, and turns on
511 GS clock periods in the 64th and 128th display periods
65535
FFFFh
Turns on during 512 GS clock periods in the 1st to 127th display period, but only turns on 511 GS
clock periods in the 128th display period
18
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