LMH0318_15 Datasheet, PDF (17/57 Pages) Texas Instruments – LMH0318 3 Gbps HD/SD SDI Reclocker with Integrated Cable Driver

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LMH0318
SNLS508 – SEPTEMBER 2015
8.3.7.1 MODE_SEL
This pin can be configured in 4 possible ways:
1. 1 kΩ to VDD: This puts the part in SPI mode
2. Float (Default): Reserved
3. 20 kΩ to GND: Reserved
4. 1 kΩ to GND: This puts the part in SMBus mode
8.3.7.2 ENABLE
Normal operation when ENABLE is pulled high, and powers down the device when pulled low.
ENABLE
1 kΩ to GND
20 kΩ to GND
Float
1 kΩ to VDD
Table 3. ENABLE Selection
POWER CONDITION
Power down device (signal detectors powered down, registers at reset state)
Reserved
Reserved
Normal Operation
8.3.7.3 LOS_INT_N
LOS_INT_N pin is an open drain output. When the channel that has been selected cannot detect a signal at the
high-speed input pins (as defined by the assert levels), the pin pulls low. Pin 13 can be configured through share
register 0xFF[5] for interrupt functionality.
In SMBus/SPI mode, this pin can be configured as an interrupt. This pin is asserted low when there is an
interrupt and goes back high when the interrupt status register is read. There are 7 separate masks for different
interrupt sources. These interrupt sources are:
1. If there is a LOS transition on IN0, irrespective of the input channel selected (2 separate masks).
2. If there is a LOS transition on IN1, irrespective of the input channel selected (2 separate masks).
3. HEO or VEO goes below a certain threshold as specified in the registers (1 mask).
4. Lock transition, whether it is asserted or de-asserted – disabled by default (2 mask).
8.3.7.4 LOCK
Indicates the lock status of the CDR. When CDR is locked this pin is asserted high.
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