PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
Pin Name
Type
Input
Pin No. Function
RADR[4]
RADR[3]
RADR[2]
RADR[1]
RADR[0]
P19
N17
P18
R20
R19
Receive Address (RADR[4:0]). The
RADR[4:1] signal is used to select the
FIFO (and hence port) that is read from
using the RENB signal and the FIFO
whose cell-available signal is visible on the
RCA output. RADR[4:0] is sampled on the
rising edge of RFCLK together with RENB.
Note that the null-PHY address 1FH is an
invalid address and will not be identified to
any port on the S/UNI-QJET.
RCA
Output N19
Receive Multi-Phy Cell Available (RCA).
The RCA signal indicates when a cell is
available in the receive FIFO for the port
selected by RADR[4:0]. RCA can be
configured to be de-asserted when either
zero or four bytes remain in the
selected/addressed FIFO. RCA will thus
transition low on the rising edge of RFCLK
after Payload byte 48 (RCALEVEL0=1) or
43 (RCALEVEL0=0) is output for the 8-bit
interface (ATM8=1), or after Payload word
24 (RCALEVEL0=1) or 19
(RCALEVEL0=0) is output for the 16-bit
interface (ATM8=0) if the PHY being polled
is the same as the PHY in use.
RCA is tri-stated when either the null-PHY
address (1FH) or an address not matching
the address space set by PHY_ADR[2:0]
is latched (by RFCLK) from the RADR[4:2]
inputs.
The polarity of RCA (with respect to the
description above) is inverted when the
RCAINV register bit is set to logic 1.
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 48
PMC [ PMC-SIERRA, INC ]
