DS90UA101-Q1 Datasheet, PDF (26/42 Pages) Texas Instruments – DS90UA101-Q1 Multi-Channel Digital Audio Link

DS90UA101-Q1
SNLS441A – JULY 2013 – REVISED SEPTEMBER 2013
Bus Activity:
Master
SDA Line S
Slave
Address
7-bit Address 0
Register
Address
Data
P
Bus Activity:
Slave
A
A
A
C
C
C
K
K
K
Figure 21. Write Byte
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SDA
SCL
START
MSB
1
7-bit Slave Address
2
6
LSB
ACK
R/W
Direction
Bit
Acknowledge
from the Device
MSB
7
8
9
1
Data Byte
2
LSB N/ACK
*Acknowledge
or Not-ACK
8
9
Repeated for the Lower Data Byte
and Additional Data Transfers
Figure 22. Basic Operation
STOP
SDA
SCL
S
START condition, or
START repeat condition
P
STOP condition
Figure 23. Start and Stop Conditions
IDx Address Decoder on the Serializer
The IDx pin (Figure 24) on the Serializer is used to decode and set the I²C address of the Serializer. There are 6
possible I²C addresses that can be set on the Serializer. The pin must be pulled to V_DD (1.8V, not V_DDIO) with a
10 kΩ resistor and a pull down resistor R_ID) of the recommended value to set the I²C address of the Serializer
(Table 2). The recommended maximum resistor tolerance is 1%.
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