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Table 3.
SPI3 Interface Signal Descriptions (Sheet 8 of 8)
Signal Name
MPHY
REOP_0
RMOD1
RMOD0
RSX
Datasheet
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
®
Intel
IXF1104 4-Port Gigabit Ethernet Media Access Controller
Ball
Type
Designator
SPHY
REOP_0
C16
REOP_1
D18
Output
REOP_2
C23
REOP_3
J19
G13
NA
Output
G14
NA
E13
Output
Standard
Description
Receive End of Packet.
REOP indicates the end of a packet when
asserted with RVAL.
3.3 V
32-bit Multi-PHY mode: REOP_0 covers
LVTTL
all 32 bits.
4 x 8 Single-PHY mode: The REOP_0:3
bits correspond to the RDAT[7:0]_n
channels.
Receive Word Modulo:
32-bit Multi-PHY mode: RMOD[1:0]
indicates the valid bytes of data in
RDAT[31:0]. During transmission, RMOD is
always "00", except when the last double-
word is transferred on RDAT[31:0].
RMOD[1:0] specifies the valid packet data
bytes on RDAT[31:0] when REOP is
asserted.
RMOD[1:0]
Valid Bytes of RDAT
3.3 V
00 = 4 bytes [31:0]
LVTTL
01 = 3 bytes [31:8]
10 = 2 bytes [31:16]
11 = 1 byte [31:24]
4 x 8 Single-PHY mode: RMOD[1:0] is not
required.
RMOD is considered valid only when RVAL
is simultaneously asserted.
RENB must be asserted for RMOD[1:0] to
be valid.
Receive Start of Transfer.
32-bit Multi-PHY mode: RSX indicates
when the in-band port address is present on
the RDAT bus. When RSX is High and
RVAL = 0, the value of RDAT[7:0] is the
3.3 V
address of the receive FIFO to be selected.
LVTTL
Subsequent data transfers on RDAT are
from the FIFO specified by this in-band
address. Values of 0, 1, 2, and 3 select the
corresponding port. RSX is ignored when
RVAL is de-asserted.
4 x 8 Single-PHY mode: RSX is ignored.
46
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