Datasheet

DS21Q50
16 of 87
2.1.2 Alternate Jitter Attenuator
Signal Name:
AJACKI
Signal Description:
Alternate Jitter Attenuator Clock Input
Signal Type:
Input
Clock input to alternate jitter attenuator.
Signal Name:
AJACKO
Signal Description:
Alternate Jitter Attenuator Clock Output
Signal Type:
Output
Clock output of alternate jitter attenuator.
2.1.3 Clock Synthesizer
Signal Name:
4/8/16MCK
Signal Description:
4.096MHz/8.192MHz/16.384MHz Clock Output
Signal Type:
Output
A 4.096MHz, 8.192MHz, or 16.384MHz clock output that is referenced to one of the four recovered line clocks
(RCLKs) or to an external 2.048MHz reference.
Signal Name:
REFCLK
Signal Description:
Reference Clock
Signal Type:
Input/Output
Can be configured as an output to source a 2.048MHz reference clock or as an input to supply a 2.048MHz
reference clock from an external source to the clock synthesizer.
2.1.4 Parallel Port Control Pins
Signal Name:
INT
Signal Description:
Interrupt
Signal Type:
Output
Flags host controller during conditions and change of conditions defined in status registers 1 and 2 and the HDLC
status register. Active-low, open-drain output.
Signal Name:
BTS0
Signal Description:
Bus Type Select Bit 0
Signal Type:
Input
Used with BTS1 to select between muxed, nonmuxed, serial bus operation, and output high-Z mode.
Signal Name:
BTS1
Signal Description:
Bus Type Select Bit 0
Signal Type:
Input
Used with BTS0 to select between muxed, nonmuxed, serial bus operation, and output high-Z mode.
Signal Name:
TS0
Signal Description:
Transceiver Select Bit 0
Signal Type:
Input
Used with TS1 to select one of four transceivers.
Signal Name:
TS1
Signal Description:
Transceiver Select Bit 0
Signal Type:
Input
Used with TS0 to select one of four transceivers.