PM7385 FREEDM-84A672
DATA SHEET
PMC-1990114
ISSUE 6
84 LINK, 672 CHANNEL FRAME ENGINE AND DATA LINK MANAGER
WITH ANY-PHY PACKET INTERFACE
Pin Name
RMOD
Type
Pin
No.
Function
Tristate U24
The receive word modulo signal (RMOD)
indicates the size of the current word on
RXDATA[15:0]. When RDAT[15:0] does not
contain the last byte of a packet (REOP set
low), RMOD is set low. When RMOD is set high
and REOP is set high, RXDATA[15:8] contains
the last data byte of a packet. When RMOD is
set low and REOP is set high, RXDATA[7:0]
contains the last byte of the packet, or
optionally, the error status byte. The behavior of
RMOD relates only to packet data and is
unaffected when the FREEDM-84A672 device is
programmed to overwrite RXDATA[7:0] with
status information when errored packets are
received.
Output
RMOD is tristated when the FREEDM-84A672
device is not selected via the RENB signal.
RMOD is updated on the rising edge of RXCLK.
RERR
Tristate V25
Output
The receive error signal (RERR) indicates that
the current packet is errored and should be
discarded. When RDAT[15:0] does not contain
the last byte of a packet (REOP set low), RERR
is set low. When RERR is set high and REOP is
set high, the current packet is errored. When
RERR is set low and REOP is set high, the
current packet is not errored.
The FREEDM-84A672 may be programmed to
overwrite RXDATA[7:0] of the final word of each
packet transfer (REOP set high) with the status
of packet reception when that packet is errored
(RERR is high).
RERR is tristated when the FREEDM-84A672
device is not selected via the RENB signal.
RERR is updated on the rising edge of RXCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
28
PMC [ PMC-SIERRA, INC ]
