DS3181 Maxim Integrated Products, DS3181 Datasheet - Page 171

• Manufacturer Part Number: DS3181
• Description: Network Controller & Processor ICs DS3-E3 ATM-Packet PH Y with Built-in Line
• Manufacturer: Maxim Integrated Products

Specifications of DS3181

• Product: Framer
• Number Of Transceivers: 1
• Data Rate: 44.736 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 280 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: TEBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

are overwritten with 11. P
output DS3 frame. And, C
10.10.5.5.1 Receive C-bit DS3 Frame Format
The DS3 frame format is shown in
referred to as the far-end SEF/AIS bits). P
are the multiframe alignment bits that define the multiframe boundary. F
define the sub-frame boundary. Note: Both the M-bits and F-bits define the DS3 frame boundary. C
Application Identification Channel (AIC). C
Far-End Alarm and Control (FEAC) signal. C
are the C-bit parity bits used for path error monitoring. C
used for remote path error monitoring. C
C
10.10.5.5.2 Receive C-bit DS3 Overhead Extraction
Overhead extraction extracts all of the DS3 overhead bits from the C-bit DS3 frame. All of the DS3 overhead bits
X
P
bit). In addition, the Application Identification Channel (AIC), which is stored in a register bit, is determined from the
C
to zero (M23 format) if the C
bit must not change when a LOS, OOF, or AIS condition is present. The C
controller. The C
10.10.6 M23 DS3 Framer/Formatter
10.10.6.1 Transmit M23 DS3 Frame Processor
The M23 DS3 frame format is shown in
are the Remote Defect Indication (RDI) bits (also referred to as the far-end SEF/AIS bits). P
bits used for line error monitoring. M
alignment bits. C
tributary #X. The X-bit, P-bit, M-bit, C-bit, and F-bit positions are overhead bits, and the other bit positions in the
DS3 frame are payload bits.
Table 10-35. M23 DS3 Frame Overhead Bit Definitions
C
1
1
M
62
11
X1
, X
, P
, and C
1
bit. The AIC is set to one (C-bit format) if the C
, C
, M
2
2
, P
, C
X
P
X2
BIT
2
F
C
1
1
, and M
, X
, P
, and C
1
XY
11
31
, P
63
, C
2
2
2
are unused, and have a value of one. C
, M
32
, and C
3
X3
X
51
, F
11
, C
is the Application Identification Channel (AIC). C
XY
Remote Defect Indication
(RDI)
Parity Bits
Multiframe Alignment Bits
Sub-frame Alignment Bits
Application Identification
Channel (AIC)
Stuff Control Bits for Tributary
#X
52
, and C
, and C
33
1
bits are output as an error indication (modulo 2 addition of the calculated parity and the
X1
, P
, C
11
2,
XY
DEFINITION
53
X2
C
bit is set to zero in four of the last 31 consecutive multiframes. Note: The stored AIC
are output on the receive overhead interface (ROH, ROHSOF, and ROHCLK). The
31
, and C
bits are sent to the receive HDLC overhead controller.
, C
32
Figure
, and C
1
X3
Figure
, M
51
(X ≠ 3) are overwritten with 000. AIS will overwrite a transmit Idle signal.
1
12
, C
2
and P
21
, and M
10-40. X
is reserved for future network use, and has a value of one. C
33
, C
52
10-40.
are overwritten with the calculated payload parity from the previous
, and C
22
2
, and C
11
are the parity bits used for line error monitoring. M
71
bit is set to one in 31 consecutive multiframes. The AIC is set
3
1
, C
Table 10-35
are the multiframe alignment bits. F
and X
171
53
72
41
23
are the path maintenance data link (or HDLC) bits. C
, and C
, C
are unused, and have a value of one. C
2
42
are the Remote Defect Indication (RDI) bits (also
, and C
73
defines the framing bits for M23 DS3. X
are unused, and have a value of one.
X1
, C
43
XY
are the Far-End Block Error (FEBE) bits
X2
13
, and C
are the sub-frame alignment bits that
bit is sent over to the receive FEAC
X3
are the stuff control bits for
1
XY
and P
are the sub-frame
31
2
, C
are the parity
1
, M
32
2
, and C
11
, and M
1
13
and X
is the
is the
61
33
3
2
,