TLC5970 Datasheet, PDF (41/48 Pages) Texas Instruments – 3-Channel, 12-Bit, PWM LED Driver with Buck DC/DC Converter and Differential Signal Interface

TLC5970
www.ti.com
SBVS140 – MARCH 2010
Internal Latch Pulse Delay Time
Shifted in lower 36-bit data in the 40-bit shift register is latched into the latch selected by the higher four bits of
the shift register after the programmed time by the following code is passed from the last rising edge of SCLK.
The next SCLK rising edge for new data inputs must be input after over two clocks of the internal oscillator clock
period from the shift register is latched.
FB DATA
(Binary)
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Table 15. Internal Latch Pulse Delay Time Selection Truth Table
FB DATA
(Decimal)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
FB DATA
(Hex)
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
INTERNAL LATCH PULSE DELAY TIME (µs)
MINIMUM
MAXIMUM
0.3
0.8
0.6
1.3
1.3
2.3
2.6
4.3
5.3
8.3
10
16
21
33
42
65
85
129
170
257
341
513
682
1025
1365
2049
2730
4097
5461
8193
10922
16385
EEPROM2 Write Data Latch (Register Address = 1101b)
The EEPROM2 write data latch data bit assignments are shown in Table 16 and Figure 33.
BIT NUMBER
6-0
13-7
20-14
27-21
35-28
Table 16. EEPROM2 Write Data Latch Bit Assignment
BIT NAME
DCOUT0
DCOUT1
DCOUT2
—
WRCMD2
DESCRIPTION
Dot correction data for OUT0 (data = 00h to 7Fh, factory default = 7Fh)
Dot correction data for OUT1 (data = 00h to 7Fh, factory default = 7Fh)
Dot correction data for OUT2 (data = 00h to 7Fh, factory default = 7Fh)
No EEPROM bits (7-bit data). Data cannot be stored in these bits even if
data are written to these bits.
Write command. When data are written to the EEPROM1 write data latch,
these data must be 5Ah (01011010b).
EEPROM2 Write Data Latch
MSB
35
28
27
21
20
14
13
LSB
7
6
0
Write
Write
No
No
OUT2
OUT2
¼ ¼ ¼ _Command
Command EEPROM
EEPROM DC Data
DC Data
Bit 7
Bit 0
Bit 6
Bit 0
Bit 6
Bit 0
OUT1
OUT1
¼ _{DC Data}
DC Data
Bit 6
Bit 0
OUT0
OUT0
¼ _{DC Data}
DC Data
Bit 6
Bit 0
Figure 33. EEPROM2 Write Data Latch Bit Assignment
Copyright © 2010, Texas Instruments Incorporated
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