35
Rev NR
APPENDIX B: FIRMWARE REVISIONS / FEATURES REGISTER
Since SIO4 boards can exist across multiple form factors and with various hardware features, the firmware/features
registers attempt to help identify the exact version of a SIO4 board. This appendix provides a more detailed
breakdown of what the firmware and features registers, and detail differences between the firmware revisions.
Firmware Register - Local Offset 0x00 (0xE5100100)
D31:16
HW Board Rev
0xE510
PCIe-SIO4BX2 Rev NR
D31
1
= Features Register Present
D30
1
= Complies with this standard
D29
1
= 66MHz PCI bus interface
0 = 33MHz PCI bus interface
D28
1 = 64 bit PCI bus interface
0
= 32 bit bus interface
D27:D24
Form Factor
0 = Reserved
1 = PCI
2 = PMC
3 = cPCI
4 = PC104P
5
= PCIe
6 = XMC
D23:D20
HW Board (sub-field of form factor)
0 = PCIe4-SIO8BX2
1
= PCIe-SIO4BX2
D19:D16
HW Board Rev (lowest rev for firmware version)
0
=NR
D15:8
Firmware Type ID
0x01
Std Firmware default
0x04
Sync Firmware default
D7:0
Firmware Revision
XX
Firmware Version
0x00
– Initial release from PMC66-SIO4BXR v117
