Rainbow-electronics MAX8759 Manual do Utilizador descarregar pdf (Página 25)

MAX8759

Low-Cost, SMBus, CCFL Backlight Controller

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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

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

that can be set based on ALS inputs. If the brightness

setting due to ALS is lower than the value written to this

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.

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Rainbow-electronics MAX8759 Manual do Utilizador Página 25