Rainbow Electronics MAX8759 - Manual (Page 25)

MAX8759
Low-Cost, SMBus, CCFL Backlight Controller
______________________________________________________________________________________ 25
BIT 7 (R) BIT 6 (R) BIT 5 (R) BIT 4 (R) BIT 3 (R) BIT 2 (R) BIT 1 (R) BIT 0 (R)
MFG4 MFG3 MFG2 MFG1 MFG0 REV2 REV1 REV0
MFG[4..0]: Manufacturer ID (the vendor ID for Maxim is 0).
REV[2..0]: Silicon rev (revs 0–7 allowed for silicon spins).
BIT 7 (R) BIT 6 (R) BIT 5 (R) BIT 4 (R) BIT 3 (R) BIT 2 (R) BIT 1 (R) BIT 0 (R)
ALS7 ALS6 ALS5 ALS4 ALS3 ALS2 ALS1 ALS0
ALS[7..0]: 256 steps of ambient-light sensor reading.
Identification Register [0x03] (POR = 0x00)
The identification register contains two bit fields to
denote the manufacturer and the silicon revision. The bit
field widths allow up to 32 vendors with up to eight sili-
con revisions each. This register is read only. A write-
byte cycle to register 0x03 has no effect.
ALS Status Register [0x04] (POR = 0x00)
The ALS should return a value reflecting the brightness
setting based on the ALS input. The register has 8 bits
that define a full range of 256 brightness levels. The
register is read only and a write-byte cycle has no
effect. A read-byte cycle to register 0x04 returns the
current reading of ALS, regardless of the operating
mode set in register 0x01.
ALS Low-Limit Register [0x05] (POR = 0x00)
The value in this read-write register reflects the lowest
possible brightness value the inverter can set based on
inputs from the ALS. Users can change this value so that
they can control the effect of ALS. A write-byte cycle to
register 0x05 sets the lowest possible brightness value
that can be set based on ALS inputs. If the brightness
setting due to ALS is lower than the value written to this
register, the inverter immediately increases the bright-
ness setting to the newly written value. A read-byte cycle
to register 0x05 returns the current minimum brightness
value that can be set based on ALS inputs.
BIT 7 (R/ W) BIT 6 (R/ W) BIT 5 (R/ W) BIT 4 (R/ W) BIT 3 (R/ W) BIT 2 (R/ W) BIT 1 (R/ W) BIT 0 (R/ W)
ALSLL7 ALSLL6 ALSLL5 ALSLL4 ALSLL3 ALSLL2 ALSLL1 ALSLL0
ALSLL[7..0]: The lowest brightness setting that can be set based on ALS inputs.