PM5352 datasheet(34/77 Pages) PMC

34 / 77 page

PM5352 S/UNI STAR

DATA SHEET

PMC-1990421

ISSUE 2

SATURN USER NETWORK INTERFACE 155 (STAR)

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

Pin Name

Type

No.

Function

PRPA

Output

(POS)

N20

POS-PHY Polled multi-PHY Receive Packet

Available (PRPA) signal.

PRPA indicates when data is available in the polled

receive FIFO. When PRPA is high, the receive

FIFO has at least one end of packet or a predefined

number of bytes to be read (the number of bytes

might be user programmable). PRPA is low when

the receive FIFO fill level is below the assertion

threshold and the FIFO contains no end of packet.

PRPA allows to poll every PHY while transferring

data from the selected PHY.

PRPA is driven by a PHY layer device when its

address is polled on RADR[2:0]. A PHY layer device

shall tristate PRPA when either the null-PHY

address (0x7H) or an address not matching the

address set by the PHY_ADR[2:0] register bits is

provided on RADR[2:0].

PRPA is only available in POS-PHY packet-level

transfer mode, as selected by the POS_PLVL

mode. PRPA is updated on the rising edge of

RFCLK.

PM5352 Datasheet(PDF) 34 Page - PMC-Sierra, Inc