AM79C971VCW Advanced Micro Devices, AM79C971VCW Datasheet - Page 191

• Manufacturer Part Number: AM79C971VCW
• Description: PCnet-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus
• Manufacturer: Advanced Micro Devices

Control and Status Registers
Note:
u = undefined value, R = Running register, S = Setup register, T = Test register; all default values are in hexadecimal format.
Addr
RAP
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Symbol
CSR10
CSR11
CSR12
CSR13
CSR14
CSR15
CSR16
CSR17
CSR18
CSR22
CSR20
CSR21
CSR22
CSR23
CSR24
CSR25
CSR26
CSR27
CSR28
CSR29
CSR30
CSR31
CSR32
CSR33
CSR0
CSR1
CSR2
CSR3
CSR4
CSR5
CSR6
CSR7
CSR8
CSR9
Default Value
see register
description
uuuu 0004
uuuu uuuu
uuuu uuuu
uuuu 0000
uuuu 0115
uuuu 0000
uuuu uuuu
0uuu 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
Comments
Am79C971 Controller Status Register
Lower IADR: maps to location 16
Upper IADR: maps to location 17
Interrupt Masks and Deferral Control
Test and Features Control
Extended Control and Interrupt 1
RXTX: RX/TX Encoded Ring Lengths
Extended Control and Interrupt 1
LADRF0: Logical Address Filter — LADRF[15:0]
LADRF1: Logical Address Filter — LADRF[31:16]
LADRF2: Logical Address Filter — LADRF[47:32]
LADRF3: Logical Address Filter — LADRF[63:48]
PADR0: Physical Address Register — PADR[15:0][
PADR1: Physical Address Register — PADR[31:16]
PADR2: Physical Address Register — PADR[47:32]
MODE: Mode Register
IADRL: Base Address of INIT Block Lower (Copy)
IADRH: Base Address of INIT Block Upper (Copy)
CRBAL: Current RCV Buffer Address Lower
CRBAU: Current RCV Buffer Address Upper
CXBAL: Current XMT Buffer Address Lower
CXBAU: Current XMT Buffer Address Upper
NRBAL: Next RCV Buffer Address Lower
NRBAU: Next RCV Buffer Address Upper
BADRL: Base Address of RCV Ring Lower
BADRU: Base Address of RCV Ring Upper
NRDAL: Next RCV Descriptor Address Lower
NRDAU: Next RCV Descriptor Address Upper
CRDAL: Current RCV Descriptor Address Lower
CRDAU: Current RCV Descriptor Address Upper
BADXL: Base Address of XMT Ring Lower
BADXU: Base Address of XMT Ring Upper
NXDAL: Next XMT Descriptor Address Lower
NXDAU: Next XMT Descriptor Address Upper
Am79C971
Use
R
S
S
S
R
R
S
R
S
S
S
S
S
S
S
S
S
S
S
S
T
T
T
T
T
T
T
T
T
T
T
T
T
T
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