PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 60

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
Pin Name
RDAT[12]
RDAT[11]
RDAT[10]
RDAT[9]
RDAT[8]
RDAT[7]
RDAT[6]
RDAT[5]
RDAT[4]
RDAT[3]
RDAT[2]
RDAT[1]
RDAT[0]
RENB
RSOC
RSOP
Type
Input
Output
Pin
No.
L28
M27
K30
L29
M28
L30
N27
M29
N28
M30
P27
N30
P28
U28
R28
Function
The POS-PHY receive packet data (RDAT[31:0]) bus carries
the POS packet octets that are read from the receive FIFO.
The RDAT[31:0] signals are valid when RVAL and RENB are
asserted.
RDAT[31:0] is updated on the rising edge of RFCLK.
The UTOPIA receive read enable (RENB) signal is used to
initiate reads from the receive FIFO. The system may de-
assert RENB at any time if it is unable to accept more data. A
read is not performed and RDAT[31:0] does not change when
RENB is sampled high. When RENB is sampled low, the
word on the RDAT[31:0] bus is read from the receive FIFO
and RDAT[31:0] changes to the next value on the next clock
cycle.
RENB is sampled on the rising edge of RFCLK.
The POS-PHY receive read enable (RENB) signal is used to
initiate reads from the receive FIFO. During a data transfer,
RVAL must be monitored since it will indicate if the data is
valid. The system may deassert RENB at any time if it is
unable to accept more data.
A read is not performed and RDAT[31:0] does not change
when RENB is sampled high. When RENB is sampled low,
the word on the RDAT[31:0] bus is read from the receive
FIFO and RDAT[31:0] changes to the next value on the next
clock cycle.
RENB is sampled on the rising edge of RFCLK.
The UTOPIA receive start of cell (RSOC) signal marks the
start of a cell structure on the RDAT[31:0] bus. The first word
of the cell structure is present on the RDAT[31:0] bus when
RSOC is high.
RSOC is updated on the rising edge of RFCLK.
The POS-PHY receive start of packet (RSOP) signal
indicates the start of a packet on the RDAT[31:0] bus.
RSOP is set high for the first word of a packet on RDAT[31:0].
RSOP is updated on the rising edge of RFCLK
S/UNI-2488 Telecom Standard Product Datasheet
Released
60