MAX9240GTM+ Maxim Integrated, MAX9240GTM+ Datasheet - Page 41

• Manufacturer Part Number: MAX9240GTM+
• Description: Serializers & Deserializers - Serdes 28Bit GMSL Deserializer
• Manufacturer: Maxim Integrated

Specifications of MAX9240GTM+

• Rohs: yes

Table 12. Staggered Output Delay
Table 13. Double-Function Configuration
Table 13a. Line Fault Mapping
The deserializer provides inputs for limited configura-
tion of the device when a FC is not connected. Connect
LCCEN = low upon power-up to disable the local control
channel and enable the double-function configuration
inputs
latched at power-up.
The line-fault detector in the deserializer monitors for line
failures such as short to ground, short to battery, and
open link for system fault diagnosis. Figure 2a shows the
Maxim Integrated
LCCEN
High
Low
6.25MHz to 100MHz, 25-Bit GMSL Deserializer for
REGISTER ADDRESS
Local Control-Channel Enable (LCCEN)
(Table
high = double
Functions as
(low = single
GPIO0/DBL
FUNCTION
0x14
DOUT6–DOUT10, DOUT23, DOUT24
DBL input
DOUT0–DOUT5, DOUT21, DOUT22
input)
GPIO
input,
13). All input configuration states are
DOUT11–DOUT15
DOUT16–DOUT20
Coax or STP Cable With Line Fault Detect
PCLKOUT
OUTPUT
high = 32-bit
GPIO1/BWS
Functions as
(low = 24-bit
FUNCTION
BWS input
Line-Fault Detection
mode)
mode,
GPIO
D[3:2]
D[1:0]
BITS
LFNEG
LFPOS
NAME
high = bypass mode)
encoding disabled,
encoding enabled)
(low = base mode,
high = HS/VS
(low = HS/VS
FUNCTION
HVEN input
MS/HVEN
MS input
VALUE
00
01
10
11
00
01
10
11
required external resistor connections. LFLT goes low
when a line fault is detected and LFLT goes high when the
line returns to normal. The line-fault failure type is stored in
0x14 D[3:0] of the deserializer. Filter LFLT with the µC to
reduce the detector’s susceptibility to temporary ground
shifts. The fault detector threshold voltages are referenced
to the deserializer ground. Additional passive components
set the DC level of the cable (Figure 2a). If the serializer
and GMSL deserializer grounds are different, the link DC
voltage during normal operation can vary and cross one
of the fault detection thresholds.
Negative cable wire shorted to supply voltage
Negative cable wire shorted to ground
Normal operation
Negative cable wire disconnected
Positive cable wire shorted to supply voltage
Positive cable wire shorted to ground
Normal operation
Positive cable wire disconnected
RX/SDA/EDC FUNCTION
DISSTAG = 0
OUTPUT DELAY RELATIVE TO DOUT0 (ns)
UART/I
high = error detection/
(low = error detection/
correction disabled,
correction enabled)
0.75
0.5
1.5
0
1
EDC input
2
C input/output
LINE FAULT TYPE
falling edge of PCLKOUT)
rising edge of PCLKOUT,
TX/SCL/ES FUNCTION
high = valid DOUT_ on
(low = valid DOUT_ on
UART/I
MAX9240
DISSTAG = 1
ES input
2
C input/output
0
0
0
0
0
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