MAX96706 Datasheet, PDF (66/73 Pages) Maxim Integrated Products – 14-Bit GMSL Deserializer with Coax or STP Cable Input

MAX96706
14-Bit GMSL Deserializer
with Coax or STP Cable Input
UART
Set I2CSEL = 0 to configure the control channel for UART
or UART to I²C. In this mode, the control channel for-
wards UART commands from the microcontroller side to
the other side of the GMSL link. When INTTYPE = 00, the
remote device acts as an I²C master to the other periph-
erals connected to the remote side device. UART-to-I²C
mode does not support devices that use clock stretching.
Base Mode
In base mode, UART packets control the serializer, dese-
rializer and attached peripherals.
UART Timing
In base mode, the UART idles high (through a pullup
resistor). Each GMSL-UART byte consists of a START
bit, 8 data bits, an even-parity bit and a stop bit (Figure
20). Keep the idle time between bytes of the same UART
packet to less than 4 bit times. The GMSL-UART protocol
is listed in Figure 21. A write packet consists of a SYNC
byte (Figure 22). Device address byte, Starting register
address byte, number of bytes to write, and the data
bytes. The slave device responds with an acknowledge
byte (Figure 23) if the write was successful. A Read pack-
et consists of a SYNC byte, Device address byte, Starting
register address byte, and number of bytes to read. The
slave device responds with an acknowledge byte and the
read data bytes.
1 UART FRAME
START
D0
D1
D2
D3
D4
D5
D6
D7
PARITY* STOP
FRAME 1
FRAME 2
FRAME 3
*BASE MODE USES EVEN PARITY
STOP
START
Figure 20. GMSL-UART Data Format for Base Mode
STOP START
SYNC
WRITE DATA FORMAT
DEV ADDR + R/W REG ADDR NUMBER OF BYTES BYTE 1
BYTE N
MASTER WRITES TO SLAVE
SYNC
READ DATA FORMAT
DEV ADDR + R/W REG ADDR NUMBER OF BYTES
ACK
MASTER READS FROM SLAVE
MASTER WRITES TO SLAVE
ACK
BYTE 1
BYTE N
Figure 21. GMSL-UART Protocol for Base Mode
MASTER READS FROM SLAVE
D0 D1 D2 D3 D4 D5 D6 D7
START 1 0 0 1 1 1 1 0 PARITY STOP
Figure 22. SYNC Byte (0x79)
D0 D1 D2 D3 D4 D5 D6 D7
START 1 1 0 0 0 0 1 1 PARITY STOP
Figure 23. ACK Byte (0xC3)
www.maximintegrated.com
Maxim Integrated │  66