____________________________________________________ DS34T101, DS34T102, DS34T104, DS34T108
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PIN DESCRIPTION
the cross-connect side) side of the elastic store. In E1 mode,
RIOCR.RSMS2specifies whether RMSYNCn pulses on CAS (0) or CRC-4 (1) multiframe
boundaries.
RLOFn/RLOSn
O
8mA
GCR1.LOSS=0 configures this pin to be RLOFn while LOSS=1 configures it to be
RLOSn.
RLOFn: Receive Loss of Frame Output
RLOFn indicates when the receive framer is searching for frame and multiframe
alignment in the incoming data stream. See section
10.11.6.RLOSn: Receive Loss of Signal Output
RLOSn indicates when the receive framer detects a loss-of-signal condition. See
Table 9-5. TDM-over-Packet Engine TDM Interface Pins
In this table, the transmit direction is the packet-to-TDM direction while the receive direction is the TDM-to-packet direction. See
Figure 6-1,
PIN DESCRIPTION
TDMn_ACLK
O
8mA
TDMoP Recovered Clock Output
The clock recovered by the TDMoP clock recovery machine is output on this pin.
TDM1_ACLK (port 1) is used in high speed E3/T3/STS1 mode.
TDMn_TCLK
Ipu
TDMoP Transmit Clock Input
This signal clocks the transmit TDM interface of the TDMoP engine. Depending on
are updated on the either the rising edge (0) or falling edge (1) of TDMn_TCLK.
In one-clock mode, TDMn_TCLK also clocks the receive TDM interface of the
the rising edge (0) or falling edge (1) of TDMn_TCLK.
This pin is only active in external mode
(GCR1.MODE=1).
Only TDM1_TCLK (port 1) is used in high speed E3/T3/STS1 mode
TDMn_TX
O
8mA
TDMoP Transmit Data Output
Serial data from the TDMoP engine is output on this pin.
Only TDM1_TX (port 1) is used in high speed E3/T3/STS1 mode (i.e. when
This pin is only active in external mode
(GCR1.MODE=1).
TDMn_TX_SYNC
Ipd
TDMoP Transmit Frame Sync Input
Frame sync information is provided to the TDMoP engine from this pin. In two-
clock mode, this signal specifies only transmit frame sync. In one-clock mode, this
signal specifies frame sync for both the transmit and receive directions.
The signal on this pin must pulse high for one
TDMn_TCLK cycle when the first bit
of a frame is expected to present on the
TDMn_TX pin (and the
TDMn_RX pin in
one-clock mode). This pulse must be repeated every N*125
s where N is a