DS92LX2122SQE/NOPB National Semiconductor, DS92LX2122SQE/NOPB Datasheet - Page 28

• Manufacturer Part Number: DS92LX2122SQE/NOPB
• Description: IC, SERDES, 50MHz, 1.05Gbps, LLP-48
• Manufacturer: National Semiconductor

Specifications of DS92LX2122SQE/NOPB

• Serdes Function: Deserializer
• Data Rate: 100Kbps
• No. Of Inputs: 2
• No. Of Outputs: 21
• Supply Voltage Range: 3V To 3.6V
• Driver Case Style: LLP
• No. Of Pins: 48
• Msl: MSL 3 - 168 Hours
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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CAMERA MODE OPERATION
In Camera mode, I
alizer from the host controller. The I
Deserializer will detect if a transaction is intended for the Se-
rializer or a slave at the Serializer. Commands are sent over
the bi-directional control channel to initiate the transactions.
The Serializer will receive the command and generate an I
transaction on its local I
izer will capture the response on the I
response as a command on the forward channel link. The
Deserializer parses the response and passes the appropriate
response to the Deserializer I
To configure the devices for camera mode operation, set the
Serializer M/S pin to LOW and the Deserializer M/S pin to
HIGH. Before initiating any I
needs to be programmed with the target slave device ad-
dresses and Serializer device address. SER_DEV_ID Regis-
ter 0x07h sets the Serializer device address and
SLAVE_x_MATCH/SLAVE_x_INDEX
0x08h~0x17h set the remote target slave addresses. The
slave address match registers must also be set. In slave mode
the address register is compared with the address byte sent
by the I2C master. If the addresses are equal to any of reg-
isters values, the I
to the I
DISPLAY MODE OPERATION
In Display mode, I
attached to the Serializer. The I
will detect if a transaction targets (local) registers within the
Serializer or the (remote) registers within the Deserializer or
a remote slave connected to the I
Deserializer. Commands are sent over the forward channel
link to initiate the transactions. The Deserializer will receive
the command and generate an I
I
response on the I
mand on the bi-directional control channel. The Serializer
parses the response and passes the appropriate response to
the Serializer I
The physical device ID of the I
determined by the analog voltage on the CAD pin input. It can
be reprogrammed by using the SER_DEV_ID register and
setting the bit . The device ID of the logical I
Deserializer is determined by programming the DES ID in the
Serializer. The state of the CAD pin input on the Deserializer
is used to set the device ID. The I
Ser/ Des will be bridged between the host to the remote slave.
To configure the devices for display mode operation, set the
Serializer M/S pin to HIGH and the Deserializer M/S pin to
2
C bus. At the same time, the Deserializer will capture the
2
C master allowing reads or writes to target device.
2
C bus.
2
2
2
C transactions originate from the controller
C bus and return the response as a com-
2
C slave will acknowledge the transaction
C transactions originate from the Deseri-
2
C bus. At the same time, the Serial-
2
2
C commands, the Deserializer
C bus.
2
C slave core in the Serializer
2
C slave in the Serializer is
2
2
C transaction on its local
C master interface of the
2
C transactions between
2
2
C bus and return the
C slave core in the
2
C slave in the
registers
2
C
28
LOW. Before initiating any I
needs to be programmed with the target slave device address
and Serializer device address. DES_DEV_ID Register 0x06h
sets the Deserializer device address and SLAVE_DEV_ID
register 0x7h sets the remote target slave address. If the I
slave address matches any of registers values, the I
will acknowledge the transaction allowing read or write to tar-
get device. Note: In Display mode operation, registers
0x08h~0x17h on Deserializer must be reset to 0x00.
PROGRAMMABLE CONTROLLER
An integrated I
DS92LX2121 Serializer and DS92LX2122 Deserializer. It
must be used to access and program the extra features em-
bedded within the configuration registers. Refer to
and
I
I
dently address slave devices. The mode enables or disables
I
I
I
vice. When enabled, the I
through and will be received by I
disabled, I
device. The pass through function also provides access and
communication to only specific devices on the remote bus.
The feature is effective for both Camera mode and Display
mode.
SYNCHRONIZING MULTIPLE LINKS
For applications requiring synchronization across multiple
links, it is recommended to utilize the General Purpose Input/
Output (GPI/GPO) pins to transmit control signals to synchro-
nize slave peripherals together. To synchronize the periph-
erals properly, the system controller needs to provide a sync
signal output. Note this form of synchronization timing rela-
tionship has a non-deterministic latency. After the control data
is reconstructed from the bi-directional control channel, there
will be a time variation of the GPI/GPO signals arriving at the
different target devices (between the parallel links). The max-
imum latency delta (t1) of the GPI/GPO data transmitted
across multiple links is 25 μs.
Note: The user must verify that the timing variations between
the different links are within their system and timing specifi-
cations.
The maximum time (t1) between the rising edge of GPI/GPO
(i.e. sync signal) arriving at Camera A and Camera B is 25
μs.
2
2
2
2
2
C PASS THROUGH
C pass-through provides an alternative means to indepen-
C bidirectional control channel communication to the remote
C bus. This option is used to determine whether or not an
C instruction is to be transferred over to the remote I
Table 2
2
C commands will be excluded to the remote I
for details of control registers.
2
C slave controller is embedded in each of the
2
C bus traffic will continue to pass
2
C commands, the Serializer
2
C devices downstream. If
2
Table 1
C slave
2
C de-
2
2
C
C