DS21FT42 Maxim Integrated Products, DS21FT42 Datasheet - Page 33

• 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

TCR1: TRANSMIT CONTROL REGISTER 1 (Address=35 Hex)
NOTE:
For a description of how the bits in TCR1 affect the transmit side formatter, see Figure 24-15.
LOTCMC
(MSB)
SYMBOL
LOTCMC
TFDLS
TYEL
TCPT
GB7S
TFPT
TSSE
TBL
TFPT
POSITION
TCR1.7
TCR1.6
TCR1.5
TCR1.4
TCR1.3
TCR1.2
TCR1.1
TCR1.0
TCPT
NAME AND DESCRIPTION
Loss Of Transmit Clock Mux Control. Determines
whether the transmit side formatter should switch to RCLK if
the TCLK input should fail to transition (see Figure 6-1 for
details).
0 = do not switch to RCLK if TCLK stops
1 = switch to RCLK if TCLK stops
Transmit F–bit Pass Through. (see note below)
0 = F bits sourced internally
1 = F bits sampled at TSER
Transmit CRC Pass Through. (see note below)
0 = source CRC6 bits internally
1 = CRC6 bits sampled at TSER during F–bit time
Software Signaling Insertion Enable. (see note below)
0 = no signaling is inserted in any channel
1 = signaling is inserted in all channels from the TS1-TS12
registers (the TTR registers can be used to block insertion on
a channel by channel basis)
Global Bit 7 Stuffing. (see note below)
0 = allow the TTR registers to determine which channels
containing all zeros are to be Bit 7 stuffed
1 = force Bit 7 stuffing in all 0-byte channels regardless of
how the TTR registers are programmed
TFDL Register Select. (see note below)
0 = source FDL or Fs bits from the internal TFDL register
(legacy FDL support mode)
1 = source FDL or Fs bits from the internal HDLC/BOC
controller or the TLINK pin
Transmit Blue Alarm. (see note below)
0 = transmit data normally
1 = transmit an unframed all one’s code at TPOS and TNEG
Transmit Yellow Alarm. (see note below)
0 = do not transmit yellow alarm
1 = transmit yellow alarm
TSSE
33 of 114
GB7S
TFDLS
TBL
(LSB)
TYEL