AM79C976 Advanced Micro Devices, AM79C976 Datasheet - Page 9
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AM79C976
Manufacturer Part Number
AM79C976
Description
PCnet-PRO 10/100 Mbps PCI Ethernet Controller
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C976.pdf
(309 pages)
- Current page: 9 of 309
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8/01/00
RAP Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Control and Status Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
LED2 Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
LED3 Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
MAX_LAT_A: PCI Maximum Latency Alias Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
MIN_GNT_A: PCI Minimum Grant Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
PADR: Physical Address Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Pause Count Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
PCIDATA0: PCI DATA Register Zero Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
PCIDATA1: PCI DATA Register One Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
PCIDATA2: PCI DATA Register Two Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
PCIDATA3: PCI DATA Register Three Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
PCIDATA4: PCI DATA Register Four Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
PCIDATA5: PCI DATA Register Five Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
PCIDATA6: PCI DATA Register Six Alias Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
PCIDATA7: PCI DATA Register Seven Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
PMAT0: OnNow Pattern Register 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
PMAT1: OnNow Pattern Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
PMC_A: PCI Power Management Capabilities Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Receive Protect Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
RCV_RING_LEN: Receive Ring Length Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
ROM_CFG: ROM Base Address Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
SID_A: PCI Subsystem ID Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
SRAM Size Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
STAT0: Status0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Software Timer Value Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
SVID_A: PCI Subsystem Vendor ID Alias Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
VID_A: PCI Vendor ID Alias Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
XMT_RING_LEN: Transmit Ring Length Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
XMTPOLLTIME: Transmit Poll Timer Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
RAP: Register Address Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
CSR0: Am79C976 Controller Status and Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
CSR1: Initialization Block Address 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
CSR2: Initialization Block Address 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
CSR3: Interrupt Masks and Deferral Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
CSR4: Test and Features Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
CSR5: Extended Control and Interrupt 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
CSR6: Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
CSR7: Extended Control and Interrupt 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
CSR8: Logical Address Filter 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
CSR9: Logical Address Filter 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
CSR10: Logical Address Filter 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
CSR11: Logical Address Filter 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
CSR12: Physical Address Register 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
CSR13: Physical Address Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
CSR14: Physical Address Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
CSR15: Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
CSR16-23: Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
CSR24: Base Address of Receive Ring Lower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
CSR25: Base Address of Receive Ring Upper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
CSR26-29: Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
CSR30: Base Address of Transmit Ring Lower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
CSR31: Base Address of Transmit Ring Upper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
CSR32-46: Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
CSR47: Transmit Polling Interval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
CSR48: Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
PHY Access Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
SRAM Boundary Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
P R E L I M I N A R Y
Am79C976
9
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