Rainbow Electronics DS2181A - Manual

E Copyright 1995 by Dallas Semiconductor Corporation.
All Rights Reserved. For important information regarding
patents and other intellectual property rights, please refer to
Dallas Semiconductor data books.
DS2181A
CEPT Primary Rate Transceiver
DS2181A
041995 1/32
FEATURES
•
Single–chip primary rate transceiver meets CCITT
standards G.704, G.706 and G.732
•
Supports new CRC4-based framing standards and
CAS and CCS signalling standards
•
Simple serial interface used for device configuration
and control in processor mode
•
Hardware mode requires no host processor;
intended for stand-alone applications
•
Comprehensive, on-chip alarm generation, alarm
detection, and error logging logic
•
Shares footprint with DS2180A T1 Transceiver
•
Companion to DS2175 T1/CEPT Elastic Store,
DS2186 Transmit Line Interface, DS2187 Receive
Line Interface, and DS2188 Jitter Attenuator
•
5V supply; low-power CMOS technology
DESCRIPTION
The DS2181A is designed for use in CEPT networks
and supports all logical requirements of CCITT Red
Book Recommendations G.704, G.706 and G.732. The
transmit side generates framing patterns and CRC4
codes, formats outgoing channel and signalling data,
and produces network alarm codes when enabled. The
receive side decodes the incoming data and esta-
blishes frame, CAS multiframe, and CRC4 multiframe
alignments. Once synchronized, the device extracts
channel, signalling, and alarm data.
A serial port allows access to 14 on-chip control and sta-
tus registers in the processor mode. In this mode, a host
processor controls features such as error logging, per-
channel code manipulation, and alteration of the receive
synchronizer algorithm.
PIN ASSIGNMENT
INT
RST
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 21
22
23
24
40-Pin DIP (600 MIL)
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40 TMSYNC
TFSYNC
TCLK
TCHCLK
TSER
TMO
TXD
TSTS
TSD
TIND
TAF
TPOS
TNEG
INT
SDI
SDO
CS
SCLK
SPS
VSS
VDD
RLOS
RFER
RBV
RCL
RNEG
RPOS
RST
TEST
RCSYNC
RSTS
RSD
RMSYNC
RFSYNC
RSER
RCHCLK
RCLK
RAF
RDMA
RRA
44-PIN PLCC
RFSA TCHCLK TCLK RMSA TFSYNC TMSYNC VDD RLOS RFER RBV RCL
7
8
9
10
11
12
13
14
15
16
17
39
38
37
36
35
34
33
32
31
30
29
18 19 20 21 22 23 24 25 26 27 28
6 5 4 3 2 1 44 43 42 41 40
RNEG
RPOS
TEST
RCSYNC
RSTS
RSD
RMSYNC
RFSYNC
RSER
RCHCLK
TSER
TMO
TXD
TSTS
TSD
TIND
TAF
TPOS
TNEG
SDI
SDO
CS
SCLK
SPS VSS RRA
RDMA RCTO
RAF
RCLK RCSA