PM5361TUPP
DATA SHEET
PMC-920526
ISSUE 8
TRIBUTARY UNIT PAYLOAD PROCESSOR
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, and STS-1 synchronous
payload envelope. OTMF is selectable to pulse
high during the V1 byte 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 V1 or H4 bytes is controlled by the
OTMFH4 bit located in the master outgoing
configuration register. Pulses on OTMF are only
effective during the H4 or V1 byte positions, as
appropriate. OTMF is ignored at other byte
positions. OTMF is sampled on the rising edge
of SCLK.
OSPE
Input
132 The active high outgoing synchronous payload
envelope (OSPE) signal identifies the bytes
within the transport envelope frame on the
DOUT[7:0] bus that carry the AU3 or AU4 virtual
container(s), and the STS-1 synchronous
payload envelopes. When the OJ1EN register bit
is set high, OSPE must be set high to mark each
such byte. When the OJ1EN bit is set low, the
outgoing virtual container (synchronous payload
envelope) is locked with the J1 byte immediately
following the C1 byte. OSPE is ignored.
DOUT[7:0], OTSPE, and OTV5 contain valid data
only for bytes in the AU3 or AU4 virtual
container(s), or the STS-1 synchronous payload
envelopes. Their contents should be ignored for
bytes in the transport overhead. The OJ1EN bit
is located in the master outgoing configuration
register. OSPE is sampled on the rising edge of
SCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
14
PMC [ PMC-SIERRA, INC ]
