co711ag Connect One Ltd., co711ag Datasheet - Page 23

• Manufacturer Part Number: co711ag
• Description: Ichip? Co710ag And Ichipsec? Co711ag Internet Controllers? Are High-performance, Firmware-based Intelligent Peripheral Devices That Provide Internet Connectivity Solutions For A Wide Range Of Embedded Devices.
• Manufacturer: Connect One Ltd.

Connect One
6.2.2 Miscellaneous Signals
MSEL
-RES
CLKIN
CLKO/HBT/
Z6
ABDD
iChip CO710AG/iChipSec CO711AG Data Sheet
Signal
Type
O
I
I
I
I
Pin No.
H10
C11
C8
B8
B7
Mode Select:
When not used must be pulled up to VDDi/o.
RESET: When -RES is LOW, iChip
immediately terminates its present activity
and clears its internal logic.
-RES must be held LOW for at least 1 ms
after power arrive to 90%.
This input is provided with a Schmidt trigger
to facilitate power-on reset generation via an
RC network.
Input clock.
Selectable to 33MHz or 66MHz via pin B11.
AT+i Configurable Pin:
CLKO (default): Clock Output. This pin
provides a clock-out to the system at the
same frequency as CLKIN. During reset the
clock out is disabled.
HBT: Heartbeat. Provides a 50% duty cycle,
40 mSec frequency square wave when iChip
firmware is properly running.
In the future, it may be changed to a GPIO.
This pin is configurable with the AT+iPN44
command (see AT+i Programmers Manual).
Auto baud rate detect. Must be connected to
RXDH (D11) pin to support auto baud rate.
• When this pin is held LOW during
• During a firmware update
• When this pin is held LOW during
power up for at least 5 seconds,
iChip will automatically enter the
Boot loader’s monitor mode.
procedure, when an external
modem dials to the iChip, pulling
this pin down to LOW will cause
iChip to immediately answer the
call and begin the update session.
power up for less than 5 seconds, it
forces iChip into auto baud rate
detection.
Description
Pin Descriptions
6-4