DS90UR916Q_13 Datasheet, PDF (30/45 Pages) Texas Instruments – 5 - 65 MHz 24-bit Color FPD-Link II Deserializer with Image Enhancement

DS90UR916Q
SNOSB46E – MARCH 2011 – REVISED APRIL 2013
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SDA
SCL
S
START condition, or
START repeat condition
Figure 28. START and STOP Conditions
P
STOP condition
To communicate with a remote device, the host controller (master) sends the slave address and listens for a
response from the slave. This response is referred to as an acknowledge bit (ACK). If a slave on the bus is
addressed correctly, it Acknowledges (ACKs) the master by driving the SDA bus low. If the address doesn't
match a device's slave address, it Not-acknowledges (NACKs) the master by letting SDA be pulled High. ACKs
also occur on the bus when data is being transmitted. When the master is writing data, the slave ACKs after
every data byte is successfully received. When the master is reading data, the master ACKs after every data
byte is received to let the slave know it wants to receive another data byte. When the master wants to stop
reading, it NACKs after the last data byte and creates a stop condition on the bus. All communication on the bus
begins with either a Start condition or a Repeated Start condition. All communication on the bus ends with a Stop
condition. A READ is shown in Figure 29 and a WRITE is shown in Figure 30.
If the Serial Bus is not required, the three pins may be left open (NC).
Resistor
RID* kΩ (5% tol)
0.47
2.7
8.2
Open
Table 9. ID[x] Resistor Value – DS90UR916Q Des
Address
7'b
7b' 111 0001 (h'71)
7b' 111 0010 (h'72)
7b' 111 0011 (h'73)
7b' 111 0110 (h'76)
Address
8'b
0 appended
(WRITE)
8b' 1110 0010 (h'E2)
8b' 1110 0100 (h'E4)
8b' 1110 0110 (h'E6)
8b' 1110 1100 (h'EC)
*Note: RID ≠ 0 ohm, do not connect directly to VSS (GND), this is not a valid address.
Slave Address
Register Address
S
A
2
A
1
A
0
a
0
c
k
a
c
k
S
Slave Address
a
A
2
A
1
A
0
1
c
k
Data
a
c
k
P
Figure 29. Serial Control Bus — READ
Slave Address
Register Address
S
A
2
A
1
A
0
a
0
c
k
a
c
k
Data
a
c
k
P
Figure 30. Serial Control Bus — WRITE
30
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