DS21Q58L+ Maxim Integrated Products, DS21Q58L+ Datasheet - Page 37

• 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): -

12.
Each DS21Q58 framer can monitor one DS0 (64kbps) channel in the transmit direction and one DS0 channel in the
receive direction at the same time. In the transmit direction, the user determines which channel is to be monitored
by properly setting the TCM0 to TCM4 bits in the CCR3 register. In the receive direction, the RCM0 to RCM4 bits in
the CCR4 register need to be properly set. The DS0 channel pointed to by the TCM0 to TCM4 bits appear in the
transmit DS0 monitor (TDS0M) register and the DS0 channel pointed to by the RCM0 to RCM4 bits appear in the
receive DS0 (RDS0M) register. The TCM4 to TCM0 and RCM4 to RCM0 bits should be programmed with the
decimal decode of the appropriate E1 channel. For example, if DS0 channel 6 in the transmit direction and DS0
channel 15 in the receive direction needed to be monitored, then the following values would be programmed into
CCR4 and CCR5:
Register Name:
Register Description:
Register Address:
Bit #
Name
Register Name:
Register Description:
Register Address:
Bit #
Name
NAME
NAME
TCM4
TCM3
TCM2
TCM1
TCM0
LIAIS
RLB
LLB
B1
B2
B3
B4
B5
B6
B7
B8
DS0 MONITORING FUNCTION
RLB
B1
7
7
BIT
BIT
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
LLB
Remote Loopback
Local Loopback
Line Interface AIS Generation Enable
Transmit Channel Monitor Bit 4. MSB of a channel decode that
determines which transmit channel data appears in the TDS0M register.
See Section
Transmit Channel Monitor Bit 3
Transmit Channel Monitor Bit 2
Transmit Channel Monitor Bit 1
Transmit Channel Monitor Bit 0. LSB of the channel decode.
Transmit DS0 Channel Bit 1. MSB of the DS0 channel (first bit to be
transmitted).
Transmit DS0 Channel Bit 2
Transmit DS0 Channel Bit 3
Transmit DS0 Channel Bit 4
Transmit DS0 Channel Bit 5
Transmit DS0 Channel Bit 6
Transmit DS0 Channel Bit 7
Transmit DS0 Channel Bit 8. LSB of the DS0 channel (last bit to be
transmitted).
B2
6
6
CCR3 (Repeated here from Section
Common Control Register 3
14 Hex
TDS0M
Transmit DS0 Monitor Register
22 Hex
LIAIS
B3
5
5
10
or details.
TCM4 = 0
TCM3 = 0
TCM2 = 1
TCM1 = 0
TCM0 = 1
TCM4
B4
4
4
37 of 74
FUNCTION
FUNCTION
TCM3
RCM4 = 0
RCM3 = 1
RCM2 = 1
RCM1 = 1
RCM0 = 0
B5
3
3
6
for convenience.)
TCM2
B6
2
2
TCM1
B7
1
1
TCM0
B8
0
0