Non-PCI Single-Chip Full Duplex Ethernet Controller with Magic Packet
5.5
LAN91C96 Power Down States
Table 5.6 - LOCAL BUS Mode Defined States (Refer To Table 5.7 For Next States To Wake-Up Events)
CURRENT STATE
CTR
ECOR
ECSR
CTR
DOES NOT
POWER
DOWN
PWRDWN PIN
(A= ASSRTD)
WAKEU
P_EN
BIT
NO.
FUNCTION POWER PWRDW
POWERS DOWN
ENABLE
DOWN
N BIT
1
A
X
X
X
X
Everything.
Asserts the
modem power
down pin
(nPWDN) also
2
nA
nA
nA
nA
X
X
X
X
0
0
0
0
0
0
1
1
0
1
1
0
Ethernet Tx,
Rx, Link
3
Ethernet Tx
Ethernet Rx,
Link
4
5
Ethernet Tx, Rx,
Link
Ethernet Tx, Rx,
Link
Notes:
The chart assumes that ECOR Function Enable bit is meaningless in LOCAL BUS mode.
ECSR Power Down bit must not be set to one(1) in LOCAL BUS mode.
Table 5.7- LOCAL BUS Mode
NEXT STATE
ECOR
ECSR
POWER
DOWN
CTR
CTR
PWR DWN PIN
(A=ASSRTD)
NO.
WAKES UP BY
FUNCTION
ENABLE
PWR-
WAKEUP_
EN BIT
COMMENTS
DWN BIT
..1
PWRDWN Pin
deassertion
nA
No change
No
No
No change ECOR
change
change
Function
Enable Bit
value is
meaningless
in LOCAL
BUS mode
..2
..3
nA
nA
X
X
0
0
0
0
0
0
Fully Awake
By writing a 0 to CTR
WAKEUP_EN bit
..4
By writing a 0 to CTR
WAKEUP_EN bit
AND CTR PWRDWN
bit = 0
nA
X
0
0
0
The CTR
PWRDWN bit
has
precedence
unlike the
LAN91C95
..5
By writing 0 to CTR
PWRDWN bit
nA
X
0
0
0
Notes:
The chart assumes that ECOR Function Enable bit is meaningless in LOCAL BUS mode.
Rev. 09/10/2004
Page 32
SMSC LAN91C965v&3v
DATASHEET
SMSC [ SMSC CORPORATION ]
