PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
Pin Name
Type
Pin No. Function
TGAPCLK[4] Output W14
Framer Gapped Transmit Clock
(TGAPCLK[4:1]). TGAPCLK[4:1] is valid
when the S/UNI-QJET is configured as a
DS3, E3, or J2 framer for non-ATM
applications by setting the FRMRONLY bit
in the S/UNI-QJET Configuration 1
Registers and the TXGAPEN bit in the
S/UNI-QJET Configuration 2 Registers.
TGAPCLK[3]
TGAPCLK[2]
TGAPCLK[1]
Y10
Y7
V5
TGAPCLK[4:1] is derived from the transmit
reference clock TICLK[4:1] or from the
receive clock if loop-timed. The overhead
bit (gapped) positions are generated
internal to the device. TGAPCLK[4:1] is
held high during the overhead bit
positions. This clock is useful for
interfacing to devices which source
payload data only. TGAPCLK[4:1] is used
to sample TDATI[4:1].
TCELL[4]
TCELL[3]
TCELL[2]
TCELL[1]
Transmit Cell Indication (TCELL[4:1]).
TCELL[x] is valid when the TCELL bit in
the S/UNI-QJET Misc. register (09BH,
19BH, 29BH, 39BH) is set.TCELL[x]
pulses once for every cell (idle or
assigned) transmitted. TCELL[x] is
updated using timing derived from the
transmit input clock (TICLK[x]), and is
active for a minimum of 8 TICLK[x] periods
(or 8 RCLK[x] periods if loop-timed).
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 32
PMC [ PMC-SIERRA, INC ]
