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

• Manufacturer Part Number: co661al-s
• Description: The Co661al-s Ichip? 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
CO661AL-S iChip supports a Sleep mode to achieve maximum power conservation when
iChip is not in use. Sleep mode is based on an external circuit that gates the oscillator
input to 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 either the
host processor or the modem (see Fig. 7-6).
Note:
FROM
iChip
iChip CO661AL-S Datasheet
RXDM
RXDH
PWSG/Z3
1: Sleep mode will be available only from iChip firmware version 8.01
GND
R2
330K
13
1
2
1
Figure 7-6 CO661AL External Sleep Mode Circuit
+3_3V
GND
GND
12
C1
0.1UF
U1A
74LV10
1
Y1
OE
+3_3V
GND
CSX750FB18.432
OUT
GND
3
C2
0.1UF
GND
TO
iChip
iChip Designs
R1
330K
X1
7-4