MAX16805_07 Datasheet, PDF (12/19 Pages) Maxim Integrated Products – EEPROM-Programmable, High-Voltage, 350mA LED Drivers with LED Current Foldback

EEPROM-Programmable, High-Voltage, 350mA
LED Drivers with LED Current Foldback
Bit Transfer
One data bit is transferred during each clock pulse.
The data on the SDA line must remain stable while SCL
is high (Figure 4).
Acknowledge
The acknowledge bit is a clocked 9th bit that the recipi-
ent uses to handshake receipt each byte of data
(Figure 5). Therefore, each byte effectively transferred
requires 9 bits. The master controller generates the 9th
SDA
clock pulse, and the recipient pulls down SDA during
the acknowledge clock pulse, so the SDA line remains
stable low during the high period of the clock pulse.
Slave Address
The MAX16805/MAX16806 have a 7-bit-long slave
address (Figure 6, Table 1). The 8th bit following the 7-
bit slave address is the R/W bit. Set the R/W bit low for
a write command and high for a read command.
Table 1. Slave Address
WRITE ADDRESS (HEX)
0xEE
READ ADDRESS (HEX)
0xEF
SCL
DATA STABLE, CHANGE OF DATA
DATA VALID ALLOWED
Figure 4. Bit Transfer
START
SDA
SCL
1
2
Figure 5. Acknowledge
NOT ACKNOWLEDGE
ACKNOWLEDGE
8
9
SDA
START
SCL
A7
A6
A5
A4
A3
A2
A1
RW
ACK
MSB
1
2
3
4
5
6
7
8
9
Figure 6. Slave Address
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