XRT84L38 Datasheet, PDF (106/451 Pages) Exar Corporation – OCTAL T1/E1/J1 FRAMER

XRT84L38
OCTAL T1/E1/J1 FRAMER
REV. 1.0.0
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Framing Control Register (FCR) - E1 Mode (Indirect Address = 0xn0H, 0x0BH)
BIT 7
BIT 6
BIT 5
BIT 4
BIT3
BIT 2
BIT 1
BIT 0
Force Re-syn- CAS Re-syn- CAS Re-syn- CRC Re-syn- CRC Re-syn- FAS Re-syn- FAS Re-syn- FAS Re-syn-
chronization chronization chronization chronization chronization chronization chronization chronization
Criteria Bit 1 Criteria Bit 0 Criteria Bit 1 Criteria Bit 0 Criteria Bit 2 Criteria Bit 1 Criteria Bit 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
BIT NUMBER
BIT NAME
BIT TYPE
BIT DESCRIPTION
7
Force Re-synchronization R/W Force Re-synchronization:
This READ/WRITE bit-field forces the re-synchronization pro-
cess of the framer.
When this bit is set to one:
The framer started the re-synchronization process. After syn-
chronization is achieved, the bit is automatically cleared.
6-5
CAS Re-synchronization
Criteria
R/W CAS Re-synchronization Criteria:
These READ/WRITE bit-field determine the criteria of Loss of
CAS Multi-frame Synchronization.
When these bits are set to 00:
Two consecutive CAS Multi-frame Alignment Signal errors in the
incoming frame will cause the declaration of Loss of CAS Multi-
frame Synchronization.
When these bits are set to 01:
Three consecutive CAS Multi-frame Alignment Signal errors in
the incoming frame will cause the declaration of Loss of CAS
Multi-frame Synchronization.
When these bits are set to 10:
Four consecutive CAS Multi-frame Alignment Signal errors in the
incoming frame will cause the declaration of Loss of CAS Multi-
frame Synchronization.
When these bits are set to 11:
Eight consecutive CAS Multi-frame Alignment Signal errors in
the incoming frame will cause the declaration of Loss of CAS
Multi-frame Synchronization.
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