Maxim Integrated DS33R11 - Manual (Page 204)

DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
204 of 344
Register Name: TR.T1RCR1
Register Description: T1 Receive Control Register 1
Register Address: 03h
Bit
# 7 6 5 4 3 2 1 0
Name — ARC OOF1 OOF2 SYNCC SYNCT SYNCE RESYNC
Default 0 0 0 0 0 0 0 0
Bit 6: Auto Resync Criteria (ARC)
0 = resync on OOF or RCL event
1 = resync on OOF only
Bits 4- 5: Out-of-Frame Select Bits (OOF2, OOF1)
OOF2 OOF1 Out-Of-Frame Criteria
0 0 2/4 frame bits in error
0 1 2/5 frame bits in error
1 0 2/6 frame bits in error
1 1 2/6 frame bits in error
Bit 3: Sync Criteria (SYNCC)
In D4 Framing Mode:
0 = search for Ft pattern, then search for Fs pattern
1 = cross couple Ft and Fs pattern
In ESF Framing Mode:
0 = search for FPS pattern only
1 = search for FPS and verify with CRC6
Bit 2: Sync Time (SYNCT)
0 = qualify 10 bits
1 = qualify 24 bits
Bit 1: Sync Enable (SYNCE)
0 = auto resync enabled
1 = auto resync disabled
Bit 0: Resynchronize (RESYNC) When toggled from low to high, a resynchronization of the receive-side framer
is initiated. Must be cleared and set again for a subsequent resync.