SPD6729QCE Intel, SPD6729QCE Datasheet - Page 23

• 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

3.0
3.1
3.1.1
3.1.2
Datasheet
Note: The PD6729 is backward-compatible with PCMCIA standards 1.0, 2.0, and 2.01. The PD6729 is
Introduction to the PD6729
System Architecture
This section describes PCMCIA basics, windowing, socket power management features, interrupts,
device power management, write FIFO usage, bus sizing, programmable PCMCIA timing, and
ATA mode operation.
PCMCIA Basics
PCMCIA is an abbreviation for Personal Computer Memory Card International Association.
PCMCIA 2.1 is a standard for using memory and I/O devices as insertable, exchangeable
peripherals for PCs (personal computers) and handheld computers.
also compatible with JEIDA 4.1 and its earlier standards corresponding with the PCMCIA
standards above.
For simpler end-user and vendor implementation of the standard, systems employing PCMCIA 2.1
should also be backward-compatible with industry-standard PC addressing.
For PCMCIA memory-type cards, the memory information must be mapped into the system
memory address space. This is accomplished with a ‘windowing’ technique that is similar to
expanded memory schemes already used in PC systems (for example, LIM 4.0 memory manager).
PCMCIA cards can have attribute and common memory. Attribute memory is used to indicate to
host software the capabilities of the PCMCIA card, and it allows host software to change the
configuration of the card. Common memory can be used by host software for any purpose (such as
flash file system, system memory, and floppy emulation).
PCMCIA I/O-type cards, such as modem network cards, should also be directly addressable, as if
the cards were I/O devices plugged into the PCI bus. For example, it would be highly desirable to
have a PCMCIA modem accessible to standard communications software as if it were at a COM
port. For COM1, this would require that the modem be accessed at system I/O address 3F8h–3FFh.
The method of mapping a PCMCIA I/O address into anticipated areas of PCI I/O space is done
similarly to memory windowing.
PCMCIA I/O-type cards usually have interrupts that need to be serviced by host software. For the
example of a modem card accessed as if at COM1, software would expect the modem to generate
interrupts on the IRQ4 line. To be sure all interrupts are routed as expected, the PD6729 can steer
the interrupt from the PCMCIA card to one of the four PCI-bus-defined interrupts or to one of
several standard PC interrupts (see
page
PD6729 Windowing Capabilities
For full compatibility with existing software, and to ensure compatibility with future memory cards
and software, the PD6729 provides five programmable memory windows per socket and two
programmable I/O windows per socket. These windows can be used by an inserted PCMCIA card
to access PCI memory and I/O space.
52).
“Interrupts” on page 27
PCI-to-PC Card (PCMCIA) Controller — PD6729
and
“Interrupt and General Control” on
23