Non-PCI Single-Chip Full Duplex Ethernet Controller
LAN91C96I Power Down States
Table 5.5 - Local Bus Mode Defined States (Refer To Table 5.6 For Next States To Wake-Up Events)
CURRENT STATE
ECOR
ECSR
CTR
CTR
PWRDWN PIN
(A= ASSRTD)
POWERS
DOWN
DOES NOT POWER
DOWN
NO.
FUNCTION POWER PWRDWN WAKEUP_EN
ENABLE
DOWN
BIT
BIT
1
A
X
X
X
X
Everything.
Asserts the
modem power
down pin
(nPWDN) also
2
3
4
nA
nA
nA
X
X
X
0
0
0
0
0
1
0
1
1
Ethernet Tx, Rx, Link
Ethernet Rx, Link
Ethernet Tx
Ethernet Tx,
Rx, Link
5
nA
X
0
1
0
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 5.6 - Local Bus Mode
NEXT STATE
PWR DWN
ECOR
ECSR
CTR
CTR PWR-
DWN BIT
PIN
NO.
WAKES UP BY
FUCNTION POWER
WAKEUP
_EN BIT
COMMENTS
ENABLE
DOWN
(A=ASSRTD)
1
PWRDWN Pin
deassertion
nA
No change
No
No change
No
ECOR Function
Enable Bit value
is meaningless in
Local Bus mode
change
change
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
nA
X
0
0
0
The CTR
PWRDWN bit
has precedence
unlike the
PWRDWN bit = 0
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.
ECSR Power Down bit must not be set to one (1) in Local Bus mode.
SMSC DS – LAN91C96I
Page 29
Rev. 11/18/2004
DATASHEET
SMSC [ SMSC CORPORATION ]
