AM79C930 datasheet(63/161 Pages) AMD

63 / 161 page

P R E L I M I N A R Y

AMD

Am79C930

The following table indicates the mapping of all I/O re-

sources that are accessible through the Am79C930

PCMCIA system interface. Note that some resources

are physically located within the BIU, while others are lo-

cated in the TAI and still others exist as external Flash

and SRAM:

Am79C930 Device PCMCIA Mode I/O MAP

Resource

PCMCIA

Resource

Physical Location

Name

Mnemonic

I/O Address

SIR1[2:0]

Size

of Resource

SIR0: General

SIR0: GCR

00h

XXX*

1 byte

BIU

Configuration Register

SIR1: Bank Switching

SIR1: BSS

01h

XXX

1 byte

BIU

Select Register

SIR2: Local Memory

SIR2: LMAL

02h

XXX

1 byte

BIU

Address [7:0]

SIR3: Local Memory

SIR3: LMAU

03h

XXX

1 byte

BIU

Address [14:8]

SIR4: I/O Data

SIR4: DPLL

04h

XXX

1 byte

Indirect access to

Port[7:0]

SRAM or Flash

memory

SIR5: I/O Data

SIR5: DPLM

05h

XXX

1 byte

Indirect access to

Port[15:8]

SRAM or Flash

memory

SIR6: I/O Data

SIR6: DPUM

06h

XXX

1 byte

Indirect access to

Port [23:16]

SRAM or Flash

memory

SIR7: I/O Data

SIR7: DPUU

07h

XXX

1 byte

Indirect access to

Port [31:24]

SRAM or Flash

memory

TIR 0–7

–

08h – 0Fh

000

1 byte

TAI

each location

TIR 8–15

–

08h – 0Fh

001

1 byte

TAI

each location

TIR 16–23

–

08h – 0Fh

010

1 byte

TAI

each location

TIR 24–31

–

08h – 0Fh

011

1 byte

TAI

each location

UNDEFINED

–

10h – 3Fh

0XX

UNDEFINED

TIR 0–31

–

08h – 27h

1 byte

TAI

each location

UNDEFINED

–

28h – 3Fh

1XX

UNDEFINED

*X = Don’t Care

ISA Plug and Play Mode Resources

The Am79C930 device fully supports the ISA Plug

and Play specification, revision 1.0a, including the

Plug and Play ADDRESS Auto-configuration port,

WRITE_DATA Auto-configuration port, READ_DATA

Auto-configuration port, and 19 of the Plug and Play

configuration registers, as well as providing a mecha-

nism for access to Flash memory for reading the

Am79C930 device’s Plug and Play Resource Data.

The following table indicates the range of I/O and mem-

ory addresses to which the Am79C930 device will re-

spond when operating in the ISA Plug and Play mode.

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