DS21Q42T+ Maxim Integrated Products, DS21Q42T+ Datasheet - Page 29

• Manufacturer Part Number: DS21Q42T+
• Description: IC FRAMER ENHANCED T1 4X 128TQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q42T+

• Controller Type: T1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS 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 20-15.
LOTCMC
SYMBOL
(MSB)
LOTCMC
TFDLS
TYEL
TCPT
GB7S
TSSE
TFPT
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 1.1 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 zero 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
29 of 116
GB7S
TFDLS
TBL
(LSB)
TYEL