AM79C976 Advanced Micro Devices, AM79C976 Datasheet - Page 247

• Manufacturer Part Number: AM79C976
• Description: PCnet-PRO 10/100 Mbps PCI Ethernet Controller
• Manufacturer: Advanced Micro Devices

Note: H = H_RESET, E = EE_RESET, P = Power on Reset
8/01/00
LADRF
LED0
LED1
LED2
LED3
MAX_LAT_A
MIN_GNT_A
PADR
PAUSE_CNT
PCIDATA0
PCIDATA1
PCIDATA2
PCIDATA3
PCIDATA4
PCIDATA5
PCIDATA6
PCIDATA7
PHY_ACCESS
PMAT0
PMAT1
PMC_A
RCV_PROTECT
RCV_RING_LEN
ROM_CFG
SID_A
SRAM_BND
SRAM_SIZE
STAT0
STVAL
SVID_A
VID_A
XMT_RING_LEN
XMTPOLLTIME
Register
Offset, hex
0DE
1BC
1CA
0DC
0E0
0E2
0E4
0E6
1B1
1B0
1BE
1C0
1C2
1C4
1C6
1C8
0D0
1B8
18E
1B4
17A
0D8
1B6
1B2
168
160
190
194
150
178
140
188
30
Width, bits
64
16
16
16
16
48
32
16
16
16
16
16
16
16
16
32
32
16
16
16
16
16
16
16
16
32
16
16
16
16
16
8
8
P R E L I M I N A R Y
Reset Value
c802h
00C0
FFFF
0094
1080
0081
1022
18h
18h
40
Am79C976
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reset Type
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
E,H
H
H
H
H
H
H
H
H
H
H
H
Logical Address Filter Register
LED 0 Control
LED 1 Control
LED 2 Control
LED 3 Control
PCI Maximum Latency Shadow Register
PHY Access
OnNow Pattern Register 1
PCI Power Management Capabilities
Shadow Register
Receive Protect Register.
Receive Descriptor Ring Length. Two’s-
complement.
SSRAM Boundary
SSRAM Size
Status 0. Read only or write 1 to clear. Bits
12-10 are reset by POR. All others are reset
by H_RESET.
Transmit Descriptor Ring Length. Two’s-
complement.
PCI Minimum Grant Shadow Register
Physical Address Register
Pause count. Read only.
PCI Data Register 0 Alias Register
PCI Data Register 1 Alias Register
PCI Data Register 2 Alias Register
PCI Data Register 3 Alias Register
PCI Data Register 4 Alias Register
PCI Data Register 5 Alias Register
PCI Data Register 6 Alias Register
PCI Data Register 7 Alias Register
OnNow Pattern Register 0
ROMBASE Configuration Register
PCI Subsystem ID Shadow Register
Software Timer Value
Subsystem Vendor ID Shadow Register
PCI Vendor ID Shadow Register
Transmit Polling Interval Register
Notes
247