Rainbow Electronics MAX8759 - Manual (Page 22)

MAX8759
Low-Cost, SMBus, CCFL Backlight Controller
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Table 3. Commands Description
DATA-REGISTER BIT ASSIGNMENT
SMBus
PROTOCOL
COMMAND
BYTE
POR
STATE
BIT 7
(MSB)
BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1
BIT 0
(LSB)
Read and
Write
0x00 0xFF BR7 BRT6 BRT5 BR4 BRT3 BRT2 BRT1 BRT0
Read and
Write
0x01 0x00 Reserved Reserved ALSDEL1 ALSDEL0 ALS_CTL PWM_MD PWM_SEL LAMP_CTL
Read Only 0x02 N/A Reserved Reserved Reserved Reserved LAMP_STAT OV_CURR Reserved FAULT
Read Only 0x03 0x00 MFG4 MFG3 MFG2 MFG1 MFG0 REV2 REV1 REV0
Read Only 0x04 0x00 ALS7 ALS6 ALS5 ALS4 ALS3 ALS2 ALS1 ALS0
Read and
Write
0x05 0x00 ALSLL7 ALSLL6 ALSLL5 ALSLL4 ALSLL3 ALSLL2 ALSLL1 ALSLL0
Read and
Write
0x06 0xFF ALSHL7 ALSHL6 ALSHL5 ALSHL4 ALSHL3 ALSHL2 ALSHL1 ALSHL0
SMBCLK
A = START CONDITION.
B = MSB OF ADDRESS CLOCKED INTO SLAVE.
C = LSB OF ADDRESS CLOCKED INTO SLAVE.
D = R/W BIT CLOCKED INTO SLAVE.
A B C D E F G H I J
SMBDATA
t SU:STA t HD:STA
t LOW t HIGH
t SU:DAT t HD:DAT t SU:DAT t SU:STO t BUF
K
E = SLAVE PULLS SMBDATA LINE LOW.
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER.
G = MSB OF DATA CLOCKED INTO MASTER.
H = LSB OF DATA CLOCKED INTO MASTER. I = ACKNOWLEDGE CLOCK PULSE.
J = STOP CONDITION.
K = NEW START CONDITION.
Figure 10. SMBus Read Timing