
STANDARD PRODUCT
PM8315 TEMUX
DATASHEET
PMC-1981125
ISSUE 7
HIGH DENSITY T1/E1 FRAMER WITH
INTEGRATED VT/TU MAPPER AND M13 MUX
PROPRIETARY AND CONFIDENTIAL
52
Pin Name
Type
Pin
No.
Function
LAC1
Input
W13
Line Add C1 Frame Pulse (LAC1).
The Add bus
timing signal identifies the frame and multiframe
boundaries on the Add Data bus LADATA[7:0].
LAC1 is set high to mark the first C1 byte of the first
transport envelope frame of the 4 frame multiframe on
the LADATA[7:0] bus. LAC1 need not be presented on
every occurrence of the multiframe .
LAC1 is sampled on the rising edge of LREFCLK.
LAC1J1V1
Output AA11
Line Add Bus Composite Timing Signal
(LAC1J1V1).
The Add bus composite timing signal
identifies the frame, payload and tributary multiframe
boundaries on the Line Add Data bus LADATA[7:0].
LAC1J1V1 pulses high with the Line Add Payload
Active signal LAPL set low to mark the first STS-1
(STM-0/AU3) identification byte or equivalently the
STM identification byte C1. Optionally the LAC1J1V1
signal pulses high with LAPL set high to mark the path
trace byte J1. Optionally the LAC1J1V1 signal pulses
high on the V1 byte to indicate tributary multiframe
boundaries.
In a system with multiple TEMUXs sharing the same
Line Add bus only one device should have LAC1J1V1
connected. All devices must be configured via the
LOCK0 bits in the Master SONET/SDH Configuration
and TTMP Telecom Interface Configuartion registers
for the same J1 location corresponding to a pointer
offset of 0 or 522.
LAC1J1V1 is updated on the rising edge of LREFCLK.