SPD6729QCE Intel, SPD6729QCE Datasheet - Page 32

• Manufacturer Part Number: SPD6729QCE
• Description: PCI To PC Card (PCMCIA) Controller 208-Pin MQFP
• Manufacturer: Intel

Specifications of SPD6729QCE

• Package: 208MQFP
• Operating Temperature: 0 to 70 °C

PD6729 — PCI-to-PC Card (PCMCIA) Controller
32
Figure 8. Indexed 8-Bit Register Structure
Figure 9. Indexed 8-Bit Register Example
The following code segment demonstrates
use of an indexed 8-bit register:
The PD6729 has Extension registers that add to the functionality of the 82365SL-compatible
register set. Within the Extension registers is an Extended Index register and Extended Data
register that provide access to more registers. The registers accessed through Extended Index and
Extended Data are thus double indexed. The example below shows how to access the Extension
Control 1 register, one of the double-indexed registers.
;Write to Extension Control 1 register example
;Constants section
;Code section
Extended_Index
Index_Reg
Ext_Cntrl_1
Base_IO_Address
mov
mov
mov
out
mov
mov
X
mov dx, XXX
mov ah, 3Ch
mov al, 02h
out dx, ax
X
dx, Base_IO_Address
al, Extended_Index
ah, Ext_Cntrl_1
dx, ax
al, Index_Reg
ah, user_data
;The base I/O address for the PD6729
;should be obtained through PCI BIOS.
EQU 2Eh
EQU 2Fh
EQU 03h
EQU XXX
X
;Desired data to be
X
Low Mid. Byte
Base Address 0 + 1
Internal Registers
Base Address 0 + 1
Internal Registers
Data
3Ch
3Ch
I/O Addresses
I/O Addresses
FFh
FEh
•
•
•
02h
01h
00h
Base Address 0
02h
Base Address 0
Register
indexes
Register
indexes
Index
02h
Low Byte
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