OXCFU950_07 Datasheet, PDF (64/74 Pages) Oxford Semiconductor – USB/UART multi-function 16-bit PC Card device

OXFORD SEMICONDUCTOR, INC.
OXCFU950 DATA SHEET
Byte Number
Description
15
87
0
1^st WORD
“00000000”
Number of tuple bytes in Attribute Memory (M)
Note : Must be a value of multiple of 2
2^nd WORD
Attribute Mem.Tuple Byte 1
Attribute Mem.Tuple Byte 0
3^rd WORD
Attribute Mem.Tuple Byte 3
Attribute Mem.Tuple Byte 2
(N + 1) th WORD
Attribute Mem.Tuple Byte N-1
Attribute Mem.Tuple Byte N-2
Table 27. Zone 1 Format
The EEPROM controller outputs a flag to signify whether a new CIS has been downloaded from the EEPROM. This allows the
memory controller to select between the default CIS or the new CIS from the EEPROM.
10.3 Zone 2 : USB Function Access zone.
This zone of the EEPROM contains information required to do any vendor-specific setup of the chip for USB operation. 8-bit
values can be written to any valid location in I/O space. Therefore this zone can set up the UART, USB and LCR if required. This
zone is executed if present on a hard reset, or a USB soft reset (via LCR or FCR). Care should be taken that the contents of
zone 2 and zone 3 are compatible, and do not conflict with each other.
Bits
Description
15
0—no more configuration WORDs to follow in zone 2. Move to next available zone or end EEPROM program if no more zones
are enabled in the header.
1—another configuration WORD follows for the local configuration registers
14:8
I/O space address.
7:0
8-bit value of the register to be programmed
Table 28. Zone 2 Format
10.4 Zone 3 : UART Function Access
This zone of the EEPROM contains information required for any vendor-specific setup of the chip for UART operation. 8-bit
values can be written to any valid location in I/O space. Therefore this zone can set up the UART, USB and LCR if required. This
zone is executed if present on a hard reset, or a UART soft reset (via LCR or FCR). Care should be taken that the contents of
zone 2 and zone 3 are compatible, and do not conflict with each other.
Bits
Description
15
0—no more configuration WORDs to follow in Zone 2. Move to next available zone or end EEPROM program if no more zones
are enabled in the header.
1—another configuration WORD follows for the local configuration registers
14:8
I/O space address.
7:0
8-bit value of the register to be programmed
Table 29. Zone 3 Format
DS-0023 February 2007
External—Free Release
Page 64 of 74