AM79C978 Advanced Micro Devices, AM79C978 Datasheet - Page 212

• Manufacturer Part Number: AM79C978
• Description: Single-Chip 1/10 Mbps PCI Home Networking Controller
• Manufacturer: Advanced Micro Devices

Bus Configuration Registers
Writes to those registers marked as “Reserved” will have no effect. Reads from these locations will produce unde-
fined values.
212
10-15
RAP
16
17
18
19
20
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
0
1
2
3
4
5
6
7
8
9
Mnemonic
EBADDRU
EBADDRL
IOBASEU
SRAMSIZ
PHY_SEL
IOBASEL
Reserved
Reserved
Reserved
MIIADDR
PCISVID
SRAMIC
MSWRA
MSRDA
MIIMDR
SRAMB
EECAS
PCILAT
PCISID
MIICAS
PCIVID
PMC_A
STVAL
DATA0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
EBDR
PMR1
PMR2
PMR3
BSBC
LED0
LED1
LED2
LED3
LED4
SWS
FDC
MC
Table 90. Bus Configuration Registers (BCRs)
Default
FFFFh
00C0h
FF06h
C811h
0005h
0005h
0002h
0084h
0088h
0090h
0000h
9001h
0002h
0200h
0000h
0000h
0000h
0000h
0000h
0000h
1022h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0082h
8000h
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Reserved
Reserved
Miscellaneous Configuration
Reserved
LED0 Status
LED1 Status
LED2 Status
LED3 Status
Reserved
Full-Duplex Control
Reserved
Reserved
Reserved
Burst and Bus Control
EEPROM Control and Status
Software Style
PCI Latency
PCI Subsystem ID
PCI Subsystem Vendor ID
SRAM Size
SRAM Boundary
SRAM Interface Control
Expansion Bus Address Lower
Expansion Bus Address Upper
Expansion Bus Data Port
Software Timer Value
PHY Control and Status
PHY Address
PHY Management Data
PCI Vendor ID
PCI Power Management Capabilities
(PMC) Alias Register
PCI DATA Register Zero Alias Register
PCI DATA Register One Alias Register
PCI DATA Register Two Alias Register
PCI DATA Register Three Alias Register
PCI DATA Register Four Alias Register
PCI DATA Register Five Alias Register
PCI DATA Register Six Alias Register
PCI DATA Register Seven Alias Register
Pattern Matching Register 1
Pattern Matching Register 2
Pattern Matching Register 3
LED4 Status
PHY Select
Am79C978
Name
User
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Programmability
EEPROM
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No