DS21Q58L+ Maxim Integrated Products, DS21Q58L+ Datasheet - Page 53

• Manufacturer Part Number: DS21Q58L+
• Description: IC TXRX E1 QUAD 3.3V 100LQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q58L+

• Function: Transceiver
• Interface: E1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 230mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Includes: AIS Alarms Detector and Generator, Loopback Functions, PRBS Generator / Detector, Remote Detector and Generator
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -

22.
The DS21Q58 provides a CMI interface for connecting to optical transports. This interface is a unipolar 1T2B-
coded signal. Ones are alternately encoded as a logical 1 or 0 level for the full duration of the clock period. Zeros
are encoded as a 0-to-1 transition at the middle of the clock period.
and its CMI result. The control bit for enabling CMI is in the OUTAC register, as shown below.
Register Name:
Register Description:
Register Address:
Bit #
Name
Figure 22-1. CMI Coding
NAME
TTLIE
CMIE
CMII
CLOCK
OA4
OA3
OA2
OA1
OA0
DATA
CMI
CODE MARK INVERSION (CMI)
TTLIE
7
1
BIT
7
6
5
4
3
2
1
0
1
TTL Input Enable. When this bit is set, the receiver can accept TTL
positive and negative data at the RTIP and RRING inputs. The data is
clocked in on the falling edge of MCLK.
CMI Invert
0 = CMI input data not inverted
1 = CMI input data inverted
Transmit and Receive CMI Enable
0 = Transmit and receive line interface operates in normal AMI/HDB3 mode/
1 = Transmit and receive line interface operate in CMI mode. TTIP is CMI
output and RTIP is CMI input. In this mode of operation TRING and RRING
are not connected.
OUTA Control Bit 4. Inverts OUTA output.
OUTA Control Bit 3. See
OUTA Control Bit 2. See
OUTA Control Bit 1. See
OUTA Control Bit 0. See
CMII
6
OUTAC
OUTA Control Register
1A Hex
0
CMIE
1
5
0
OA4
4
Table 20-1
Table 20-1
Table 20-1
Table 20-1
0
53 of 74
FUNCTION
1
OA3
3
for details.
for details.
for details.
for details.
OA2
2
Figure 22-1
OA1
1
shows an example data pattern
OA0
0