DS21FT42 Maxim Integrated Products, DS21FT42 Datasheet - Page 52

• Manufacturer Part Number: DS21FT42
• Description: IC FRAMER T1 4X3 12CH 300-BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21FT42

• Controller Type: T1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 225mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 300-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

The TCM4 to TCM0 and RCM4 to RCM0 bits should be programmed with the decimal decode of the
appropriate T1 channel. Channels 1 through 24 map to register values 0 through 23. For example, if
DS0 channel 6 (timeslot 5) in the transmit direction and DS0 channel 15 (timeslot 14) in the receive
direction needed to be monitored, then the following values would be programmed into CCR5 and
CCR6:
CCR5: COMMON CONTROL REGISTER 5 (Address=19 Hex)
[repeated here from section 10 for convenience]
TDS0M: TRANSMIT DS0 MONITOR REGISTER (Address=1A Hex)
(MSB)
(MSB)
TJC
SYMBOL
SYMBOL
B1
TCM4
TCM3
TCM2
TCM1
TCM0
TCM4 = 0
TCM3 = 0
TCM2 = 1
TCM1 = 0
TCM0 = 1
TJC
B1
B2
B3
B4
B5
–
–
B2
–
RCM4 = 0
RCM3 = 1
RCM2 = 1
RCM1 = 1
RCM0 = 0
POSITION
POSITION
TDS0M.7
TDS0M.6
TDS0M.5
TDS0M.4
TDS0M.3
CCR5.7
CCR5.5
CCR5.5
CCR5.4
CCR5.3
CCR5.2
CCR5.1
CCR5.0
B3
–
NAME AND DESCRIPTION
NAME AND DESCRIPTION
Transmit Japanese CRC Enable. See Section 10 for
details.
Not Assigned. Must be set to zero when written.
Not Assigned. Must be set to zero when written.
Transmit Channel Monitor Bit 4. MSB of a channel
decode that determines which transmit DS0 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.
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.
TCM4
B4
52 of 114
TCM3
B5
TCM2
B6
TCM1
B7
TCM0
(LSB)
(LSB)
B8