![](http://datasheet.mmic.net.cn/330000/PM6344-RI_datasheet_16444359/PM6344-RI_35.png)
STANDARD PRODUCT
PMC-Sierra, Inc.
PM6344 EQUAD
PMC-951013
ISSUE 5
QUADRUPLE E1 FRAMER
22
Pin Name
Type
Pin No.
Function
BTCLK[1]
BTCLK[2]
BTCLK[3]
BTCLK[4]
Input
73
74
75
76
Backplane Transmit Clock (BTCLK[4:1]). BTCLK[4:1]
are the 2.048MHz transmit clocks with optional gapping
for adaptation from non-uniform backplane data
streams. The EQUAD may be configured to ignore the
BTCLK[x] input and use the associated RCLKO[x] signal
in its place.
MTCLK
Multiplexed Transmit Clock (MTCLK). MTCLK shares a
pin with BTCLK[1]. BTCLK[4:2] are unused when the
multiplex enable (MENB) input is asserted low. When
the multiplex enable (MENB) input is asserted low, this
clock is 16.384 MHz. MTFP and MTD are sampled on
the rising edge of MTCLK.
TDLSIG[1]
TDLSIG[2]
TDLSIG[3]
TDLSIG[4]/
I/O
113
114
117
118
Transmit Data Link Signal (TDLSIG[4:1]). The
TDLSIG[4:1] signals are input on this pin when the
associated internal HDLC transmitter (XFDL) is disabled
from use, or if fractional E1 insertion is selected.
TDLSIG[x] is the source for the data stream to be
inserted into the selected data link bits. The EQUAD
may be configured to utilize timeslot 16 as a data link or
utilize any combination of the national bits as a data link.
If fractional E1 insertion is enabled, TDLSIG[x] is the
data source for the E1 channels enabled by the Channel
Select registers.
TDLSIG[x] is sampled on the rising edge of the
associated TDLCLK[x]. The TDLSIG[x] pins have
integral pull-ups.
TDLINT[1]
TDLINT[2]
TDLINT[3]
TDLINT[4]
Transmit Data Link Interrupt (TDLINT[4:1]). The
TDLINT[4:1] signals are output on these pins when the
associated XFDL is enabled. Each TDLINT[x] goes high
when the last data byte written to the XFDL has been
set up for transmission and processor intervention is
required to either write control information to end the
message, or to provide more data.