am79c930 Advanced Micro Devices, am79c930 Datasheet - Page 60

• Manufacturer Part Number: am79c930
• Description: Pcnet-mobile Single-chip Wireless Lan Media Access Controller
• Manufacturer: Advanced Micro Devices

Some of the Am79C930 device’s PCMCIA Common
Memory locations have predefined uses and, therefore,
are not freely available to the device driver.
60
in Common Memory
AMD
PCMCIA Address
7C00h – 7FEFh
7FF0h – 7FFFh
0000h – 03FFh
0400h – 041Fh
0420h – 043Fh
0440h – 047Fh
Am79C930 Device PCMCIA Mode Common Memory Restricted Space
SIR1[5:3]
000
000
000
111
111
000
P R E L I M I N A R Y
The
Restricted Space
Am79C930
1K–16 bytes
1 Kbytes
32 bytes
32 bytes
64 bytes
16 bytes
Size of
following
within PCMCIA Common Memory map of the
Am79C930 device:
table
Description of Reserved Use
This space is reserved for the interrupt
vector table of the embedded 80188
core.
This SRAM space is inaccessible to
the 80188 embedded core, since the
80188 core maps the 32 TIR registers
of the TAI into this portion of 80188
memory space.
This SRAM space is inaccessible to
the 80188 embedded core, since the
80188 core maps the MIR registers of
the BIU (PIR, PDLC and PUCT) and
XCE space into this portion of 80188
memory space.
This SRAM space is reserved for future
use and may be decoded for non-
SRAM purposes in the future.
These bytes of the Flash memory also
map into PCMCIA Attribute Memory
space 0000h – 03FFh, which is used
for storing the CIS for the device.
Therefore, this space cannot be used
for non-CIS purposes.
These 16 bytes of Flash memory
space are reserved because they are
the location of the embedded 80188
core’s instruction pointer following a
Am79C930 device reset operation.
These 16 bytes must contain the first
80188 instructions.
Physical Memory and
SRAM Memory 0 0000h – 0 03FFh
SRAM Memory 0 0400h – 0 041Fh
SRAM Memory 0 0420h – 0 042Fh
SRAM Memory 0 0440h – 0 047Fh
Flash Memory 1 FC00h – 1 FFEFh
Flash Memory 1 FFF0h – 1 FFFFh
indicates
restricted
space