STANDARD PRODUCT
PM4328 TECT3
DATASHEET
PMC-2011596
ISSUE 1
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
Pin Name
Type Pin Function
No.
TFPO/TMFPO/
TGAPCLK
Output AB3
Framer Transmit Frame Pulse/Multi-frame Pulse
Reference (TFPO/TMFPO). TFPO/TMFPO is valid
when the TECT3 is configured as a DS3 framer by
setting the OPMODE[1:0] bits in the Global
Configuration register and setting the TXGAPEN bit to
0 in the DS3 Master Unchannelized Interface Options
register.
TFPO pulses high for 1 out of every 85 clock cycles,
giving a reference M-subframe indication.
TMFPO pulses high for 1 out of every 4760 clock
cycles, giving a reference M-frame indication.
TFPO/TMFPO is updated on the falling edge of TICLK.
TFPO/TMFPO can be configured to be updated on the
rising edge of TICLK by setting the TDATIFALL bit to
1in the DS3 Master Unchannelized Interface Options
register..
Framer Gapped Transmit Clock (TGAPCLK).
TGAPCLK is valid when the TECT3 is configured as a
DS3 framer by setting the OPMODE[1:0] bits in the
Global Configuration register and setting the
TXGAPEN bit to 1 in the DS3 Master Unchannelized
Interface Options register.
TGAPCLK is derived from the transmit reference clock
TICLK or from the receive clock if loop-timed. The
overhead bit (gapped) positions are generated internal
to the device. TGAPCLK is held high during the
overhead bit positions. This clock is useful for
interfacing to devices which source payload data only.
TGAPCLK is used to sample TDATI and TFPI/TMFPI
when TXGAPEN is set to 1.
This signal shares a signal pin with ECLK[1]. When
enabled for unchannelized DS3 operation this signal
will be TFPO/TMFPO/TGAPCLK, otherwise it will be
ECLK[1].
TDATI
Input AB4
Framer Transmit Data (TDATI). TDATI contains the
serial data to be transmitted when the TECT3 is
configured as a DS3 framer by setting the
PROPRIETARY AND CONFIDENTIAL
30
PMC [ PMC-SIERRA, INC ]
