參數(shù)資料
型號: CDK8920A
廠商: Cirrus Logic, Inc.
英文描述: CRYSTAL LAN ISA PLUG-AND-PLAY ETHERNET CONTROLLER
中文描述: 水晶藍的ISA即插即用,即插即用以太網(wǎng)控制器
文件頁數(shù): 116/144頁
文件大?。?/td> 1229K
代理商: CDK8920A
SUSPEND MODE
CS8920A ISA drivers are off
Ignoring normal frames
looking for wakeup
STANDBY MODE
CS8920A ISA drivers are on/active
Ignoring normal frames
looking for wakeup
NORMAL MODE
- ISA drivers on
- Looking for normal frames
- Ignoring wakeup frames
RESET = 1
or
ISA = off
ISA = on
and WakeupEn = 0, as read
from the EEPROM
RESET = 1
WakeupEn = 1
(from software
over the ISA bus)
WakeupEn = 0
(from software
over the ISA bus)
ISA = off
(causing reset = 1)
ISA = on
and
WakeupEn = 1
(from EEPROM)
ISA = off
and
WakeupEn = 1
(from the
EEPROM)
ISA = on
or RESET = 1
(qualified)
RESET STATE
CS8920A Inactive during reset
Read PPEROM
Normal frames are ignored
ISA = on
or
RESET = 1
(qualified)
Receive
Wakeup
frame
ASSERTING EWAKE
or GENERATE INTRQ
Deassert WakeupEn
DROPPING NORM
PACKETS
Ignoring wakeup frame
CS8920A drivers off
RxMiss occuring
ASSERT EWAKE
ISA = on
or
RESET = 1
(qualified)
Receive
Wakeup
frame
ISA = off
or
RESET = 0
ISA = off
and
WakeupEn = 0
(from EEPROM)
RESET is defined as an ISA bus reset signal.
ISA off is defined as the sensing of the ISA signals in the power off state.
This is accomplished when MEMR_b = MEMW_b = IOR_b = 0, which can only happen when the ISA bus is power off.
Figure 5.14.Wakeup Frame State Diagram
CS8920A
116
DS238PP2
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