PM5362TUPP-PLUS
DATA SHEET
PMC-951010
ISSUE 6
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR / PERFORMANCE MONITOR
Pin Name Type
Pin
Function
No.
OTMF
Input
125
The active high outgoing tributary multiframe
(OTMF) signal identifies the first frame of the
tributary multiframe for each AU3, or AU4
administrative unit, or STS-1 synchronous
payload envelope. OTMF is selectable to pulse
high during the third byte after J1 of the first
tributary or during the H4 byte of the path
overhead which indicates that the next frame is
the first frame of the tributary multiframe.
Selection between marking the third byte after
each J1 or H4 bytes is controlled by the
OTMFH4 bit. Pulses on OTMF are only effective
during the H4 or third byte after each J1 byte
positions, as appropriate. OTMF is ignored at
other byte positions.
In outgoing byte interface mode (OBMODE set
high), OTMF is sampled on the rising edge of
SCLK.
In outgoing nibble interface mode (OBMODE set
low), OTMF is ignored at the less significant
nibble timeslots. OTMF is sampled on the rising
edge of NSCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
21
PMC [ PMC-SIERRA, INC ]
