REGISTERS
Copyright 2017
6-4
FibreXtreme Hardware Reference
6.4.3 Board CSR (BRD_CSR)
– Offset 0x04
Field
Description
Access
Reset
Value
0
Little Endian
– Set to ‘1’ for unswapped control
registers. Setting to ‘0’ has no effect.
R/W
1
1
Reset
– Write ‘1’ to reset the board. Writing ‘0’ has no
effect.
W
0
2
Swap data bytes
– Set to ‘1’ to 32-bit swap the data
transferred through PIO
transactions. ‘0’ for unswapped
transactions.
R/W
0
3
JTAG TCK# - Controls the TCK# line on the JTAG port.
R/W
0
4
JTAG TMS# - Controls the TMS# line on the JTAG port.
R/W
0
5
JTAG TDO# - Controls the TDO# line on the JTAG port.
R/W
0
6
JTAG TDI# - TDI# line from the JTAG port.
R
1
7
JTAG Enable
– Enable the JTAG port on the FPGA.
R/W
0
13 to 8
Revision ID
– Revision level of the board controller.
R
See
desc.
14
3.3 V/5 V PCI Signaling
– The 66 and 33 MHz designs
use the same firmware. Both designs will display a '1'
indicating 3.3V signaling by our current software
packages. However, the 33 MHz design supports only
5V signaling and the hardware is keyed to only support
5V PCI plots.
A
‘1’ indicates the SL100/SL240 card uses 3.3 V PCI
signaling.
A ‘0’ indicates the SL100/SL240 card uses 5 V PCI
signaling.
R
See
desc.
15
SL100/SL240
– A ‘1’ indicates this is an SL240 board,
a ‘0’ indicates it is an SL100.
R
See
desc.
23 to 16
Extended Revision ID
– These bits are used to identify
intermediate or special firmware revisions. (Note 1)
R
See
desc.
24
Big Endian
– Set to ‘1’ to swap the control registers.
Set to ‘0’ for Little Endian.
R/W
0
25
64-bit transaction disable
– Set to ‘1’ to disable 64-bit
transactions
. Set to ‘0’ to enable 64-bit transactions
R/W
0
26
Swap words
– Set to ‘1’ to swap words within a 64-bit
transaction. Set to ‘0’ for no swapping.
R/W
0
31 to 27
Reserved.
None
0
Note 1: Extended Revision ID.
Bits 23 and 22 of the Extended Revision ID provide information about the
FibreXtreme model as follows:
00 – 33 MHz PCI based FibreXtreme products (PCI, PMC, and CompactPCI)
01 – 66 MHz PCI based FibreXtreme products (PCI and PMC)
10 – Reserved for future 33 MHz products.
11 – Reserved for future 66 MHz products.
Содержание FHF5-PC4MWB04-00
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