ds2155gt-r Maxim Integrated Products, Inc., ds2155gt-r Datasheet - Page 43
ds2155gt-r
Manufacturer Part Number
ds2155gt-r
Description
Ds2155 T1/e1/j1 Single-chip Transceiver
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS2155GT-R.pdf
(238 pages)
- Current page: 43 of 238
- Download datasheet (2Mb)
7. SPECIAL PER-CHANNEL REGISTER OPERATION
Some of the features described in the data sheet that operate on a per-channel basis use a special method
for channel selection. There are five registers involved: per-channel pointer register (PCPR) and per-
channel data registers 1–4 (PCDR1–4). The user selects which function or functions are to be applied on a
per-channel basis by setting the appropriate bit(s) in the PCPR register. The user then writes to the PCDR
registers to select the channels for that function. The following is an example of mapping the transmit and
receive BERT function to channels 9–12, 20, and 21.
Write 11h to PCPR
Write 00h to PCDR1
Write 0fh to PCDR2
Write 18h to PCDR3
Write 00h to PCDR4
The user may write to the PCDR1-4 with muliple functions in the PCPR register selected, but can only
read the values from the PCDR1-4 registers for a single function at a time. More information about how
to use these per-channel features can be found in their respective sections in the data sheet.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0/Bert Transmit Channel Select (BTCS)
Bit 1/Transmit Fractional Channel Select (TFCS)
Bit 2/Payload Error Insert Channel Select (PEICS)
Bit 3/Transmit Hardware Signaling Channel Select (THSCS)
Bit 4/Bert Receive Channel Select (BRCS)
Bit 5/Receive Fractional Channel Select (RFCS)
Bit 6/Receive Signaling Reinsertion Channel Select (RSRCS)
Bit 7/Receive Signaling All-Ones Insertion Channel Select (RSAOICS)
RSAOICS
7
0
RSRCS
PCPR
Per-Channel Pointer Register
28h
6
0
RFCS
5
0
BRCS
4
0
43 of 238
THSCS
3
0
PEICS
0
2
TFCS
0
1
BTCS
0
0
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