ACT8740
Rev PrB, 25-Feb-08
WLED BIAS DC/DC CONVERTER
REGISTER DESCRIPTIONS
Note: See Table 1 for default register settings.
Table 5:
REG2 Control Register Map
DATA
ADDRESS
D7
R
D6
R
D5
D4
D3
D2
D1
D0
20h
21h
22h
23h
VSET
R
R
R
R
R
W/E
R
R
R
W/E
W/E
ON
R
R
W/E
W/E
W/E
W/E
W/E
W/E
W/E
OK
W/E
W/E
R: Read-Only bits. Default Values May Vary.
W/E: Write-Exact bits. Read/Write bits which must be written exactly as specified in Table 1.
Table 6:
REG2 Control Register Bit Descriptions
ADDRESS
NAME
BIT
ACCESS
FUNCTION
DESCRIPTION
REG2 Over Voltage Threshold
Selection
20h
VSET
[5:0]
R/W
See Table 7
20h
21h
21h
22h
22h
[7:6]
[0]
R
W/E
R
READ ONLY
WRITE-EXACT
READ ONLY
[7:1]
[5:0]
[7:6]
W/E
R
WRITE-EXACT
READ ONLY
0
REG2 Disable
REG2 Enable
Output is not OK
Output is OK
23h
23h
ON
OK
[0]
[1]
R/W
R
REG2 Enable
1
0
1
REG2 Power-OK
23h
23h
23h
[2]
[3]
W/E
R
WRITE-EXACT
READ ONLY
[7:4]
W/E
WRITE-EXACT
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