XRT79L71 Datasheet, PDF (126/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L71
REV. P1.0.3
BIT NUMBER
NAME
2
DS3/E3 CLK_OUT Invert
1
DS3/E3 CLK_IN Invert
0
Reframe
PRELIMINARY
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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
TYPE
R/W
R/W
R/W
DESCRIPTION
DS3/E3_CLK_OUT Invert:
This READ/WRITE bit-field permits the user to configure the
DS3/E3 Frame Generator block within the XRT79L71, to update
the DS3/E3_DATA_OUT output pin upon either the rising or fall-
ing edge of DS3/E3_CLK_OUT.
0 - DS3/E3_DATA_OUT is updated upon the rising edge of DS3/
E3_Clk_OUT. The user should insure that the LIU IC will sample
"DS3/E3_DATA_OUT" upon the falling edge of "DS3/
E3_CLK_OUT".
1 - DS3/E3_DATA_OUT is updated upon the falling edge of DS3/
E3_CLK_OUT. The user should insure that the LIU IC will sam-
ple "DS3/E3_DATA_OUT" upon the rising edge of "DS3/
E3_CLK_OUT".NOTE: This bit-field is only active if the DS3/E3
Frame Generator block has been configured to operate in the
Egress Path.
DS3/E3_CLK_IN Invert:
This READ/WRITE bit-field permits the user to configure the
XRT79L71, to sample and latch the "DS3/E3_DATA_IN" input pin
upon either the rising or falling edge of DS3/E3_CLK_IN.
0 - DS3/E3_DATA_IN is sampled upon the falling edge of DS3/
E3_CLK_IN.
1 - DS3/E3_DATA is sampled upon the rising edge of DS3/
E3_CLK_IN.NOTE: This bit-field is only active if the Primary
Frame Synchronizer block has been configured to operate in the
Ingress Path.
DS3/E3 Frame Synchronizer Block - Reframe Command:
A "0" to "1" transition, within this bit-field commands the DS3/E3
Frame Synchronizer block to exit the Frame Maintenance Mode,
and go back and enter the Frame Acquisition Mode.
NOTE: The user should go back and set this bit-field to "0"
following execution of the "Reframe" Command.
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