describe
The MAX9249 serializer with LVDS system interface utilizes Maxim's Gigabit Multimedia Serial Link (GMSL) technology. The MAX9249 serializer forms a complete digital serial link with any GMSL deserializer pair for joint transmission of high-speed video, audio, and control data.
The MAX9249 allows a maximum serial payload data rate of 2.5Gbps for a 15m shielded twisted pair (STP) cable. The maximum clock rate for serial operation is 104MHz (3-channel LVDS) or 78MHz (4-channel LVDS). This serial link supports display panels from QVGA (320 x 240) to WXGA (1280 x 800) and higher, with 24 bit colors.
The 3-channel mode processes LVDS data (21 bits), UART control signals, and three audio signals from three channels. The 4-channel mode processes four LVDS data channels (28 bits), UART control signals, three audio signals, and/or up to three auxiliary parallel inputs. These three audio inputs form a standard I2S interface that supports sampling rates from 8 kHz to 192 kHz and audio word lengths of 4 to 32 bits. The embedded control channel forms a full duplex, differential, 100kbps to 1Mbps UART link between the serializer and deserializer. The electronic control unit (ECU) or microcontroller (FC) can be located on the MAX9249 side of the link (usually used for video display), the deserializer side of the link (usually used for image sensing), or on both sides. In addition, the control channel supports ECU/FC control of remote peripheral devices, such as backlight control, grayscale gamma correction, camera module, and touch screen. The basic mode communication with peripherals uses I2C or GMSL UART format. The bypass mode allows for full duplex communication using a custom UART format.
The pre emphasis of the MAX9249 serializer driver and the channel equalizer on the GMSL deserializer extend the length of the link and improve its reliability. Spread spectrum can be used on MAX9249 to reduce parallel output of serial links and GMSL deserializers. The serial output complies with ISO 10605 and IEC 61000-4-2 ESD protection standards.
The core power supply of MAX9249 is 1.8V. The input/O supply range is 1.8V to 3.3V. The MAX9249 comes with a 48 pin TQFP package (7mmx7mm) and an exposed pad. The electrical performance is guaranteed to be within the temperature range of -40NC to+105NC in the car.
function
Pairing with any GMSL deserializer
2.5Gbps payload rate AC coupled serial link
With 8B/10B line coding
Supports up to 24 bit WXGA (1280 x 800)
colour
8.33MHz to 104MHz (3-channel LVDS) or 6.25MHz
To 78MHz (4-channel LVDS) input clock
4-bit to 32-bit word length, 8kHz to 192kHz I2S
Audio channel supports high-definition audio
Embedded half duplex/full duplex bidirectional control
Channel (100kbps to 1Mbps)
Interrupt supported touch screen functions
Display panel
Remote I2C host for peripherals
Pre emphasis line driver
Serial programmable spread spectrum
Reduce EMI output
Automatic data rate detection allows for 'dynamic' data rate changes
Input clock PLL jitter attenuator
Built-in PRBS generator for BER testing
Serial Link
The line fault detector has detected a short circuit to the serial link
Grounding, battery or open circuit
ISO 10605 and IEC 61000-4-2 ESD protection
-Operating temperature range from 40NC to+105NC
1.8V to 3.3V I/O, 1.8V core, and 3.3V LVDS
supplies
Applying for a patent
application
High resolution car navigation
Rear seat infotainment
Megapixel camera system
