Rainbow Electronics MAX1621 - Manual (Page 14)

START
CONDITION
MOST
SIGNIFICANT
ADDRESS BIT
LEAST
SIGNIFICANT
ADDRESS BIT
SLAVE
PULLS
SDA LOW
SLAVE
PULLS
SDA LOW
REGSEL
D4
OPR-LCDON
OPR-SHDN
D3 D2 D1 D0
SLAVE
ACKNOWLEDGE
SLAVE
ACKNOWLEDGE
MOST
SIGNIFICANT
DATA BIT
LEAST
SIGNIFICANT
DATA BIT
SCL
SDA
R/W BIT
DAC DATA
Figure 8. MAX1621 Serial-Interface Single-Byte Write Example (REGSEL = 1)
MAX1620/MAX1621
Digitally Adjustable LCD Bias Supplies
14 ______________________________________________________________________________________
START
CONDITION
MOST
SIGNIFICANT
ADDRESS BIT
LEAST
SIGNIFICANT
ADDRESS BIT
SLAVE PULLS
SDA LOW
SLAVE PULLS
SDA LOW
REGSEL D4
SUS-SHDN DAC DATA
D3 D2 D1 D0
SLAVE
ACKNOWLEDGE
SLAVE
ACKNOWLEDGE
MOST
SIGNIFICANT
DATA BIT
LEAST
SIGNIFICANT
DATA BIT
SCL
SDA
R/W BIT
SUS-LCDON
Figure 7. MAX1621 Serial-Interface Single-Byte Write Example (REGSEL = 0)