IDT82P2288 Datasheet, PDF (164/384 Pages) Integrated Device Technology – Octal T1/E1/J1 Long Haul Short Haul Transceiver

IDT82P2288
OCTAL T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
T1/J1 FRMR Mode 1 (04EH, 14EH, 24EH, 34EH, 44EH, 54EH, 64EH, 74EH)
Bit No.
7
6
5
4
Bit Name
Type
Reserved
Default
3
DDSC
R/W
0
2
MIMICC
R/W
0
1
M2O1
R/W
0
0
M2O0
R/W
0
DDSC:
This bit selects the synchronization criteria of T1 DM format.
= 0: If a correct DDS pattern is received before the first F-bit of a single correct Frame Alignment Pattern and there is no mimic pattern, the T1 DM
synchronization is acquired.
= 1: If a single correct Frame Alignment Pattern is received, and twelve correct DDS patterns before each F-bit of the correct Frame Alignment
Pattern are all detected, and there is no mimic pattern, the T1 DM synchronization is acquired.
MIMICC:
This bit selects the synchronization criteria in SF format and ESF format.
In SF format:
= 0: When two consecutive Frame Alignment Patterns are received error free in the data stream, the SF is synchronized. In this case, the exist-
ence of mimic patterns is ignored.
= 1: When two consecutive Frame Alignment Patterns are received error free in the data stream without mimic pattern, the SF is synchronized.
In ESF format:
= 0: When a single correct Frame Alignment Pattern and a single correct CRC-6 are found in the same frame, the ESF is synchronized. In this
case, the existence of mimic patterns is ignored.
= 1: When four consecutive Frame Alignment Patterns are detected error free in the received data stream without mimic pattern, the ESF is syn-
chronized.
M2O[2:1]:
In SF format, these two bits define the threshold of the F Bit Error numbers in N-bit sliding F bits window. Exceeding the threshold will lead to out
of synchronization.
In ESF format, these two bits define the threshold of the Frame Alignment Bit Error numbers in N-bit sliding Frame Alignment bits window.
Exceeding the threshold will lead to out of synchronization.
In T1 DM format, these two bits define the threshold of the 7-bit pattern error numbers in N-pattern sliding 7-bit patterns window. The 7-bit pattern
consists of the 6-bit DDS pattern and its following F-bit. Exceeding the threshold will lead to out of synchronization.
In SLC-96 format, these two bits define the threshold of the Ft bit error numbers in N-bit sliding Ft bits window or the Fs bit error numbers in N-bit
sliding Fs bits in Frame (2n) (0<n<12 and n=36) window. Exceeding the threshold will lead to out of synchronization.
M2O[1:0]
00
01
10
11
Error Numbers
2
2
2
N-Bit/Pattern Sliding Window
4
5
6
Reserved
Programming Information
153
March 22, 2004