AM79C961 Datasheet, PDF (37/173 Pages) Advanced Micro Devices – PCnetTM-ISA+ Jumperless Single-Chip Ethernet Controller for ISA

PRELIMINARY
Power up
RESET or
Reset Command
Set CSN = 0
State
Active
Commands
Wait for Key No active
commands
Initiation Key
State
SLEEP
Active
Commands
Reset
Wait for Key
Wake[CSN]
(WAKE = 0) AND (CSN = 0)
(WAKE ≠ 0) AND (Wake = CSN)
State
Isolation
Lose serial
(WAKE <> CSN)
isolation OR
(WAKE <> CSN)
Active
Commands
Reset
Wait for Key
Set RD_Data
Port
Serial Isolation
Wake[CSN]
State
Config
Set CSN
Active
Commands
Reset
Wait for Key
Wake[CSN]
Resource Data
Status
Logical Device
I/O Range Check
Activate
Configuration
Registers
Notes
1. CSN = Card Select Number
2. RESET or the Reset command
causes a state transition from the cur-
rent state to Wait for Key and sets all
CSNs to zero.
3. The Wait for Key command causes a
state transition from the current state
to Wait for Key.
Plug and Play ISA Card State Transitions
18183B-13
Plug and Play Registers
The PCnet-ISA⁺ controller supports all of the defined
Plug and Play card control registers. Refer to the tables
on the following pages for detailed information.
AMD
Am79C961
1-511