ds2156gn Maxim Integrated Products, Inc., ds2156gn Datasheet - Page 138
ds2156gn
Manufacturer Part Number
ds2156gn
Description
Ds2156, Ds2156l, Ds2156ln T1/e1/j1 Single-chip Transceiver Tdm/utopia Ii Interface
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS2156GN.pdf
(265 pages)
- Current page: 138 of 265
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22.3 HDLC Mapping
22.3.1 Receive
The HDLC controllers must be assigned a space in the T1/E1 bandwidth in which they transmit and
receive data. The controllers can be mapped to either the FDL (T1), Sa bits (E1), or to channels. If
mapped to channels, then any channel or combination of channels, contiguous or not, can be assigned to
an HDLC controller. When assigned to a channel(s), any combination of bits within the channel(s) can be
avoided.
The HxRCS1–HxRCS4 registers are used to assign the receive controllers to channels 1–24 (T1) or
1–32 (E1) according to the following table:
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0/Receive HDLC Channel Select Bit 0 (RHCS0). Select Channel 1, 9, 17, or 25.
Bit 1/Receive HDLC Channel Select Bit 1 (RHCS1). Select Channel 2, 10, 18, or 26.
Bit 2/Receive HDLC Channel Select Bit 2 (RHCS2). Select Channel 3, 11, 19, or 27.
Bit 3/Receive HDLC Channel Select Bit 3 (RHCS3). Select Channel 4, 12, 20, or 28.
Bit 4/Receive HDLC Channel Select Bit 4 (RHCS4). Select Channel 5, 13, 21, or 29.
Bit 5/Receive HDLC Channel Select Bit 5 (RHCS5). Select Channel 6, 14, 22, or 30.
Bit 6/Receive HDLC Channel Select Bit 6 (RHCS6). Select Channel 7, 15, 23, or 31.
Bit 7/Receive HDLC Channel Select Bit 7 (RHCS7). Select Channel 8, 16, 24, or 32.
HxRCS1
HxRCS2
HxRCS3
HxRCS4
Register
RHCS7
7
0
RHCS6
H1RCS1, H1RCS2, H1RCS3, H1RCS4
H2RCS1, H2RCS2, H2RCS3, H2RCS4
HDLC # 1 Receive Channel Select x
HDLC # 2 Receive Channel Select x
92h, 93h, 94h, 95h
A2h, A3h, A4h, A5h
6
0
Channels
17–24
25–32
9–16
1–8
RHCS5
5
0
RHCS4
4
0
138 of 265
RHCS3
3
0
RHCS2
2
0
RHCS1
1
0
RHCS0
0
0
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