OXMPCI952 Datasheet, PDF (80/108 Pages) Oxford Semiconductor – Integrated High Performance Dual UARTs, 8-bit Local Bus/Parallel Port. 3.3v PCI/miniPCI interface.

OXFORD SEMICONDUCTOR LTD.
OXmPCI952
9.1.2 Zone 1: Local Configuration Registers
The Zone1 region of EEPROM contains the program value
of the vendor-specific Local Configuration Registers using
one or more configuration WORDs. Registers are selected
using a 7-bit byte-offset field. This offset value is the offset
from Base Address Registers in I/O or memory space (see
section 5.4).
The format of the EEPROM words for this zone, is as
shown. Note that not all of the registers in the Local
Configuration Register set are writable by EEPROM.
Bits Description
15 ‘0’ = There are no more Configuration WORDs
to follow in Zone1. Move to the next available
zone or end EEPROM program if no more zones
are enabled in the Header.
‘1’ = There is another Configuration WORD to
follow for the Local Configuration Registers.
14:8 These seven bits define the byte-offset of the
Local configuration register to be programmed.
For example the byte-offset for LT2[23:16] is
0x0E.
7:0 8-bit value of the register to be programmed
The following table shows which Local Configuration registers are writable from the EEPROM. Note that an attempt by the
EEPROM to write to any other offset locations can result in unpredictable behaviour.
Offset
0x00
0x00
0x00
0x00
0x00
0x04
0x05
0x06
0x07
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0E
0x0E
0x0F
0x0F
0x0F
0x0F
0x0F
0x1E
0x1E
0x1E
0x1F
Bits
1:0
2
4:3
6:5
7
7:0
7:0
5:0
26
31:29
7:0
7:0
7:0
7:0
7:0
7:0
3:0
6:4
7
2:0
4:3
5
6
7
1:0
4
7:5
7:0
Description
Must be ‘00’.
Enable UART clock-out.
Endian byte-lane select.
Power-down filter.
MIO2_PME enable.
Multi-purpose IO configuration.
Multi-purpose IO configuration.
Multi-purpose IO configuration.
Multi-purpose IO configuration.
Clkrun Features, Filter Disable
Local Bus timing parameters
Local Bus timing parameters
Local Bus timing parameters
Local Bus timing parameters
Local Bus timing parameters
Local Bus timing parameters
Must be ‘0000’.
IO Space Block size.
Lower-Address-CS-Decode.
Lower-Address-CS-Decode.
Must be ‘00’
Must be ‘0’.
Local Bus clock enable.
Bus interface type.
UART Interrupt Mask
MIO0/Parallel Port interrupt mask
Multi-purpose IO interrupt mask.
Multi-purpose IO interrupt mask.
Reference
LCC[2]
LCC[4:3]
LCC[6:5]
LCC[7]
MIC[7:0]
MIC[15:8]
MIC[21:16]
MIC[26]
MIC[31:29]
LT1[7:0]
LT1[15:8]
LT1[23:16]
LT1[31:24]
LT2[7:0]
LT2[15:8]
LT2[22:20]
LT2[23]
LT2[26:24]
LT2[28:27]
LT2[30]
LT2[31]
GIS[17:16]
GIS[20]
GIS[23:21]
GIS[30:24]
DS-0020 Jun 05
Page 80