
Intel IXP2800 and IXP2850 Network Processors
Signal Description
Datasheet
31
SPI4_RDAT_H(0)
SPI4_RDAT_H(1)
SPI4_RDAT_H(2)
SPI4_RDAT_H(3)
SPI4_RDAT_H(4)
SPI4_RDAT_H(5)
SPI4_RDAT_H(6)
SPI4_RDAT_H(7)
SPI4_RDAT_H(8)
SPI4_RDAT_H(9)
SPI4_RDAT_H(10)
SPI4_RDAT_H(11)
SPI4_RDAT_H(12)
SPI4_RDAT_H(13)
SPI4_RDAT_H(14)
SPI4_RDAT_H(15)
SPI4_RDAT_L(0)
SPI4_RDAT_L(1)
SPI4_RDAT_L(2)
SPI4_RDAT_L(3)
SPI4_RDAT_L(4)
SPI4_RDAT_L(5)
SPI4_RDAT_L(6)
SPI4_RDAT_L(7)
SPI4_RDAT_L(8)
SPI4_RDAT_L(9)
SPI4_RDAT_L(10)
SPI4_RDAT_L(11)
SPI4_RDAT_L(12)
SPI4_RDAT_L(13)
SPI4_RDAT_L(14)
SPI4_RDAT_L(15)
I
LVDS
RDAT[15:0]
TxData[15:0]
Receive Data. From PHY/Switch
Fabric.
32
SPI4_RPAR_H
SPI4_RPAR_L
I
LVDS
Not Used
TxPar
Receive Parity. If not used (i.e, SPI-4
mode) then this differential pair should
be set to a logical 1 (SPI4_RPAR_H =
1 and SPI4_RPAR_L = 0). This is
required for the dynamic training to
function properly.1
2
SPI4_RCTL_H
SPI4_RCTL_L
I
LVDS
RCTL
TxSOF
Receive Framing indicator.
2
SPI4_RPROT_H
SPI4_RPROT_L
I
LVDS
RPROT
TPROT
Receive Protocol Type. It indicates the
protocol type, SPI-4 or CSIX-L1, of the
receive data, and can be tied statically
low or high: 0 = SPI-4, 1 = CSIX-L1.
RPROT must be driven to 1 during the
entire CFRAME or 0 for the entire
SPI-4 burst.
If not used (i.e, SPI-4 mode) then this
differential pair should be set to a
logical 0 (SPI4_RPROT_H = 0 and
SPI4_RPROT_L = 1). This is required
for the dynamic training to function
2
SPI4_RSCLK
O
LVTTL
RSCLK
--
Receive Status Clock. Reference for
RSTAT.
2
SPI4_RSTAT(0)
SPI4_RSTAT(1)
O
LVTTL
RSTAT[1:0]
--
Receive FIFO Status.
2
Table 7.
MSF Data Signals (Sheet 2 of 4)
Signal Name
I/O
Type
SPI-4 Use
CSIX Use
Description
Number