TCA6507_16 Datasheet, PDF (29/45 Pages) Texas Instruments – Low-Voltage 7-Bit I2C and SMBus LED Driver

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Typical Application (continued)
TCA6507
SCPS164C – MAY 2007 – REVISED JANUARY 2016
512
512
512
1024 ms ms 1024 ms ms 1024 ms ms 1024 ms
2048 ms
BANK0 100%
256
256 ^{512 512}
ms _{512 512}
ms ^{ms ms 1024 ms ms ms 1024 ms}
BANK1 80%
Figure 23. Blinking Pattern for the Two Banks
9.2.2 Detailed Design Procedure
For the typical application blinking pattern seen in Figure 23, the desired values are listed in Table 23, with the
corresponding registers and values.
SECTION
Fade-ON time
Fully-ON time
Fade-OFF time
First fully-OFF time
Second fully-OFF
time
Maximum
brightness
BANK1
VALUE
256
512
512
1024
1024
62.5
BANK0
VALUE
1024
512
1024
512
2048
100
Table 23. LED Pattern
UNIT
ms
ms
ms
ms
REGISTER
0x03
0x04
0x05
0x06
BANK1 NIBBLE
(HEX)
0x4
0x6
0x6
0x8
ms
0x07
0x8
BANK0 NIBBLE
(HEX)
0x8
0x6
0x8
0x6
0xA
%
0x08
0x9
0xF
REGISTER
VALUE (HEX)
0x48
0x66
0x68
0x86
0x8A
0x9F
The select register values are shown in Table 24.
NAME
SELECT0
SELECT1
SELECT2
REGISTER
Table 24. Select Registers
ADDRESS
0x00
0x01
0x02
VALUE
(BINARY)
8b0000 0100
8b0000 0101
8b0000 0111
VALUE
(HEX)
0x04
0x05
0x07
With the above values for the appropriate registers, the next step must be to write the values to the device. This
can be accomplished very easily with the auto-increment feature (see Auto-Increment Mode for more
information).
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