ds21ft40 Maxim Integrated Products, Inc., ds21ft40 Datasheet - Page 42

• Manufacturer Part Number: ds21ft40
• Description: Ds21ft40 Four X Three 12 Channel E1 Framer
• Manufacturer: Maxim Integrated Products, Inc.

direction and DS0 channel 15 (timeslot 14) in the receive direction needed to be monitored, then the
following values would be programmed into CCR4 and CCR5:
CCR4: COMMON CONTROL REGISTER 4 (Address=A8 Hex)
[Repeated here from section 5 for convenience]
TDS0M: TRANSMIT DS0 MONITOR REGISTER (Address=A9 Hex)
(MSB)
(MSB)
RLB
SYMBOLS
SYMBOLS
B1
TCM4
TCM3
TCM2
TCM1
TCM0
RLB
TCM4 = 0
TCM3 = 0
TCM2 = 1
TCM1 = 0
TCM0 = 1
B1
B2
B3
B4
B5
B6
B7
B8
–
–
B2
–
RCM4 = 0
RCM3 = 1
RCM2 = 1
RCM1 = 1
RCM0 = 0
POSITION
POSITION
TDS0M.7
TDS0M.6
TDS0M.5
TDS0M.4
TDS0M.3
TDS0M.2
TDS0M.1
TDS0M.0
CCR4.7
CCR4.6
CCR4.5
CCR4.4
CCR4.3
CCR4.2
CCR4.1
CCR4.0
B3
–
NAME AND DESCRIPTION
Remote Loopback.
Not Assigned. Should be set to zero when written.
Not Assigned. Should be set to zero when written.
Transmit Channel Monitor Bit 0. LSB of the channel decode.
NAME AND DESCRIPTION
0 = loopback disabled
1 = loopback enabled
Transmit Channel Monitor Bit 4. MSB of a channel decode
that deter-mines which transmit channel data will appear in the
TDS0M register. See Section 8 or details.
Transmit Channel Monitor Bit 3.
Transmit Channel Monitor Bit 2.
Transmit Channel Monitor Bit 1.
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).
TCM4
B4
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TCM3
B5
TCM2
B6
TCM1
B7
TCM0
(LSB)
(LSB)
DS21FT40
B8