spd6722qcce Intel Corporation, spd6722qcce Datasheet - Page 38

• Manufacturer Part Number: spd6722qcce
• Description: Isa-to-pc-card Pcmcia Controllers
• Manufacturer: Intel Corporation

PD6710/’22 — ISA-to-PC-Card (PCMCIA) Controllers
4.3
38
Power-On Setup
;Read from Extension Control 1 register example
;Code section
Following reset, the PD67XX must be configured by host software. The host software’s setup
procedure is different depending on its PC system configuration, in particular, the power supply
arrangement.
The application of the RESET signal (see
all the PD67XX register bits and fields to their reset values. Not all registers have reset values; only
registers with bits and fields specified to have reset values are initialized.
One bit, which is loaded on hardware reset from the SPKR_OUT*/C_SEL pin (see
page
out
mov
mov
out
mov
mov
mov
out
mov
out
inc
in
16), is used to determine the socket to which the PD67XX will respond.
dx, PD67XX_Index
al, Extended_Index
ah, Ext_Cntrl_1
dx, ax
al, Index_Reg
dx, al
dx
al, dx
dx, ax
al, Index_Reg
ah, user_data
dx, ax
;Desired data to be
;written to
;extended index 03h
;al has extended
;index 03h data
Table 2 on page
20) on power-up causes initialization of
Table 1 on
Datasheet