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LED7708 데이터시트(PDF) 37 Page - STMicroelectronics

부품명 LED7708
상세설명  16 channels x 85 mA LED driver with boost controller and 4-wire serial interface
PDF  53 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LED7708 데이터시트(HTML) 37 Page - STMicroelectronics

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LED7708
Recommended operating conditions
Doc ID 022698 Rev 1
37/53
8.5.9
CHSEL register
The CHSEL register is a readable/writable configuration register. Every bit of this register
allows the user to enable/disable the channels. Independent control of the channels (e.g.
scrolling backlight or phase shift) can be achieved by acting on this register.
8.5.10
CHSTA register
The CHSTA register is a read only status register. Each bit of this register shows the status
of the corresponding channel. After the error detection sequence takes place, the channels
which have an excessive voltage drop (LED short-circuit) or that are unable to regulate the
nominal current (open channels) are tagged as faulty and the related CHSTA bits are
asserted.
The CHSEL register is not affected by the error detection sequence. The channels disabled
by clearing the corresponding bits of the CHSEL register are not involved in the error
detection and the corresponding bits of the CHSTA register are forced low. The CHSTA
register is automatically overwritten during subsequent error detection occurrences.
Table 17.
CHSEL register
Bit
Position
Attribute
Meaning
CHSEL0 to
CHSEL15
0
R/W
1= the corresponding channel is active.
0= the corresponding channel is disabled.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15



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