ds2154lnd2 Maxim Integrated Products, Inc., ds2154lnd2 Datasheet - Page 42
![no-image](/images/no-image-200.jpg)
ds2154lnd2
Manufacturer Part Number
ds2154lnd2
Description
Ds2154 Enhanced E1 Single Chip Transceiver
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS2154LND2.pdf
(87 pages)
- Current page: 42 of 87
- Download datasheet (2Mb)
7 DS0 MONITORING FUNCTION
The DS2154 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 CCR4 register. In the receive direction, the
RCM0 to RCM4 bits in the CCR5 register need to be properly set. The DS0 channel pointed to by the
TCM0 to TCM4 bits will appear in the Transmit DS0 Monitor (TDS0M) register and the DS0 channel
pointed to by the RCM0 to RCM4 bits will 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 (time slot 5) in the transmit direction and DS0
channel 15 (time slot 14) in the receive direction needed to be monitored, then the following values would
be programmed into CCR4 and CCR5:
CCR4: DS0 MONITORING FUNCTION (Address = A8 Hex)
(Repeated here from Section
(MSB)
RLB
SYMBOL
TCM4
TCM3
TCM2
TCM1
TCM0
LIAIS
RLB
LLB
LLB
TCM4 = 0
TCM3 = 0
TCM2 = 1
TCM1 = 0
TCM0 = 1
POSITION
CCR4.7
CCR4.6
CCR4.5
CCR4.4
CCR4.3
CCR4.2
CCR4.1
CCR4.0
4
for convenience.)
LIAIS
NAME AND DESCRIPTION
Remote Loopback. See Section
Local Loopback. See Section
Line Interface AIS Generation Enable. See Section
details
Transmit Channel Monitor Bit 4. MSB of a channel decode
that determines which transmit channel data will appear in the
TDS0M register.
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
that determines which transmit DS0 channel data will appear in
the TDS0M register.
TCM4
RCM4 = 0
RCM3 = 1
RCM2 = 1
RCM1 = 1
RCM0 = 0
.
42 of 87
TCM3
TCM2
4
for details
4
for details
TCM1
.
.
TCM0
(LSB)
4
for
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