
DS21455/DS21458 Quad T1/E1/J1 Transceivers
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Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Note:
Writing this register resets the detector’s integration period
.
Bit 0/Receive-Spare Code Definition Bit 0 (C0).
A “don’t care” if a 1-bit to 7-bit length is selected.
Bit 1/Receive-Spare Code Definition Bit 1 (C1).
A “don’t care” if a 1-bit to 6-bit length is selected.
Bit 2/Receive-Spare Code Definition Bit 2 (C2).
A “don’t care” if a 1-bit to 5-bit length is selected.
Bit 3/Receive-Spare Code Definition Bit 3 (C3).
A “don’t care” if a 1-bit to 4-bit length is selected
Bit 4/Receive-Spare Code Definition Bit 4 (C4).
A “don’t care” if a 1-bit to 3-bit length is selected.
Bit 5/Receive-Spare Code Definition Bit 5 (C5).
A “don’t care” if a 1-bit or 2-bit length is selected.
Bit 6/Receive-Spare Code Definition Bit 6 (C6).
A “don’t care” if a 1-bit length is selected.
Bit 7/Receive-Spare Code Definition Bit 7 (C7).
First bit of the repeating pattern.
Register Name:
RSCD2
Register Description:
Receive-Spare Code Definition Register 2
Register Address:
BFh
Bit #
7
6
5
Name
C7
C6
C5
Default
0
0
0
Bit 0/Receive-Spare Code Definition Bit 0 (C0).
A “don’t care” if a 1-bit to 7-bit length is selected.
Bit 1/Receive-Spare Code Definition Bit 1 (C1).
A “don’t care” if a 1-bit to 7-bit length is selected.
Bit 2/Receive-Spare Code Definition Bit 2 (C2).
A “don’t care” if a 1-bit to 7-bit length is selected.
Bit 3/Receive-Spare Code Definition Bit 3 (C3).
A “don’t care” if a 1-bit to 7-bit length is selected.
Bit 4/Receive-Spare Code Definition Bit 4 (C4).
A “don’t care” if a 1-bit to 7-bit length is selected.
Bit 5/Receive-Spare Code Definition Bit 5 (C5).
A “don’t care” if a 1-bit to 7-bit length is selected.
Bit 6/Receive-Spare Code Definition Bit 6 (C6).
A “don’t care” if a 1-bit to 7-bit length is selected.
Bit 7/Receive-Spare Code Definition Bit 7 (C7).
A “don’t care” if a 1-bit to 7-bit length is selected.
RSCD1
Receive-Spare Code Definition Register 1
BEh
7
C7
0
6
C6
0
5
C5
0
4
C4
0
3
C3
0
2
C2
0
1
C1
0
0
C0
0
4
C4
0
3
C3
0
2
C2
0
1
C1
0
0
C0
0