co661al-l Connect One Ltd., co661al-l Datasheet - Page 35

• Manufacturer Part Number: co661al-l
• Description: The Co661al-l Ichip Lan? Internet Controller? Is Part Of A Family Of Intelligent Peripheral Devices That Provides Internet Connectivity Solutions To A Myriad Of Embedded Devices
• Manufacturer: Connect One Ltd.

7.5 Sleep Mode
The CO661AL-L iChip LAN supports a Sleep mode to achieve maximum power
conservation when the iChip is not in use. Sleep mode is based on an external circuit that
gates the oscillator input to the iChip. The PWSG (pin 41) is an output pin used to trigger
Sleep mode. While in this mode, iChip current consumption is reduced to ~1 mA. The
external circuit is designed to wake-up and exit sleep mode when a transmission arrives
from the host processor (see Fig. 7-6).
Note:
iChip LAN CO661AL-L Datasheet
FROM
iChip
RXDH
PWSG/Z3
1: Sleep mode will be available only from iChip firmware version 801
GND
R2
330K
1
2
1
Figure 7-6 CO661AL External Sleep Mode Circuit
+3_3V
GND
14
7
GND
3
U2A
74LV00
C1
0.1UF
1
Y1
OE
+3_3V
GND
CSX750FB18.432
OUT
GND
3
C2
0.1UF
GND
TO
iChip
iChip Designs
R1
330K
X1
7-4