DS21Q42T+ Maxim Integrated Products, DS21Q42T+ Datasheet - Page 33

• 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

CCR3: COMMON CONTROL REGISTER 3 (Address=30 Hex)
(MSB)
RESMDM
TCLKSRC
SYMBOL
RESMDM
TESMDM
TLOOP
RLOSF
RSMS
ECUS
PDE
TCLKSRC RLOSF
POSITION
CCR3.7
CCR3.6
CCR3.5
CCR3.4
CCR3.3
CCR3.2
CCR3.1
CCR3.0
NAME AND DESCRIPTION
Receive Elastic Store Minimum Delay Mode. See Section 13 for
details.
0 = elastic stores operate at full two frame depth
1 = elastic stores operate at 32–bit depth
Transmit Clock Source Select. This function allows the user to
internally select RCLK as the clock source for the transmit side
formatter.
0 = Transmit side formatter clocked with signal applied at TCLK
pin.
LOTC Mux function is operational (TCR1.7)
1 = Transmit side formatter clocked with RCLK.
Function of the RLOS/LOTC Output. Active only when FMS =
1 (DS21Q41 emulation).
0 = Receive Loss of Sync (RLOS)
1 = Loss of Transmit Clock (LOTC)
RSYNC Multiframe Skip Control. Useful in framing format
conversions from D4 to ESF. This function is not available when
the receive side elastic store is enabled.
0 = RSYNC will output a pulse at every multiframe
1 = RSYNC will output a pulse at every other multiframe note: for
this
bit to have any affect, the RSYNC must be set to output multiframe
pulses (RCR2.4=1 and RCR2.3=0).
Pulse Density Enforcer Enable.
0 = disable transmit pulse density enforcer
1 = enable transmit pulse density enforcer
Error Counter Update Select. See Section 8 for details.
0 = update error counters once a second
1 = update error counters every 42 ms (333 frames)
Transmit Loop Code Enable. See Section 16 for details.
0 = transmit data normally
1 = replace normal transmitted data with repeating code as defined
in TCD register
Transmit Elastic Store Minimum Delay Mode. See Section 13
for details.
0 = elastic stores operate at full two frame depth
1 = elastic stores operate at 32–bit depth
RSMS
33 of 116
PDE
ECUS
TLOOP
LSB)
TESMDM