MAX9257GCM/V+ Maxim Integrated Products, MAX9257GCM/V+ Datasheet - Page 18

• Manufacturer Part Number: MAX9257GCM/V+
• Description: IC SER/DESER PROG 48-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX9257GCM/V+

• Function: Serializer/Deserializer
• Data Rate: 840Mbps
• Input Type: Serial
• Output Type: LVDS
• Number Of Inputs: 16
• Number Of Outputs: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Fully Programmable Serializer/Deserializer
with UART/I
The MAX9257 serializer pairs with the MAX9258 deseri-
alizer to form a complete digital video serial link. The
electronic control unit (ECU) programs the registers in
the MAX9257, MAX9258, and peripheral devices, such
as a camera, during the control channel phase that
occurs at startup or during the vertical blanking time.
All control channel communication is half-duplex. The
UART communication between the MAX9258 and the
MAX9257 is encoded to allow transmission through AC-
coupling capacitors. The MAX9257 communicates to
the peripheral device through UART or I
The MAX9257/MAX9258 DC-balanced serializer and
deserializer operate from a 5MHz-to-70MHz parallel
clock frequency, and are capable of serializing and
Figure 17. Serial Link with I
Figure 18. Serial Link with UART Camera Programming Interface (Bypass Mode)
18
______________________________________________________________________________________
UART
UART
ECU
ECU
Detailed Description
PIXEL CLOCK
PIXEL CLOCK
HSYNC_OUT
VSYNC_OUT
2
HSYNC_OUT
VSYNC_OUT
VIDEO DATA
VIDEO DATA
C Camera Programming Interface (Base Mode)
ERROR
ERROR
CCEN
LOCK
CCEN
LOCK
PD
PD
RX
TX
RX
TX
2
C Control Channel
DESERIALIZER
DESERIALIZER
MAX9258
MAX9258
UART
UART
2
C.
100Ω
100Ω
deserializing programmable 10, 12, 14, 16, and 18 bits
parallel data during the video phase. The MAX9257/
MAX9258 have two phases of operation: video and
control channel (Figures 19 and 20). During the video
phase, the MAX9257 accepts parallel video data and
transmits serial encoded data over the LVDS link. The
MAX9258 accepts the encoded serial LVDS data and
converts it back to parallel output data. The MAX9257
has dedicated inputs for HSYNC and VSYNC. The
selected VSYNC edge causes the MAX9257/MAX9258
to enter the control channel phase. Nonactive VSYNC
edge can be asserted after eight pixel clock cycles.
The video data are coded using two overhead bits
(EN0 and EN1) resulting in a serial-word length of N+2
bits. The MAX9257/MAX9258 feature programmable
100Ω
100Ω
SERIALIZER
SERIALIZER
MAX9257
MAX9257
TO-I
UART-
UART
2
C
PIXEL CLOCK
PIXEL CLOCK
VIDEO DATA
VIDEO DATA
HSYNC_IN
VSYNC_IN
HSYNC_IN
VSYNC_IN
GPIO
SDA
GPIO
SCL
RX
TX
CAMERA
CAMERA
UART
I
2
C