co120sq Connect One Ltd., co120sq Datasheet - Page 25

• Manufacturer Part Number: co120sq
• Description: The Ichip? Co120sq Internet Controller? Is A High-performance, Firmware-based Intelligent Peripheral Device That Provides Internet Connectivity Solutions For A Wide Range Of Embedded Devices.
• Manufacturer: Connect One Ltd.

6.3.2 Pin Functional Descriptions (Modem Connection)
6.3.2.1
Signal
-MSEL
-RESIN
CLKIN
RXDI/HBT
TXDI /
NEWDATA
iChip CO120SQ Data Sheet
Miscellaneous Signals (Modem Connection)
Type
I(PU)
I(ST)
I/OD
O
I
Pin No.
24
19
41
1
2
Description
Mode Select:
• When this pin is held LOW during power up for at
• When this pin is held LOW during power up for
• If iChip is in SerialNET mode, iChip exits
When not used, can be left Not Connected.
-RESET INPUT: When -RESIN is LOW, iChip
immediately terminates its present activity and clears
its internal logic. -RESIN must be held LOW for at
least 10 ms after power reaches 90%.
This input is provided with a Schmitt trigger to
facilitate power-on reset generation via an RC
network.
Oscillator Input: The Oscillator must be 16MHz.
Monitor Mode: RXDI (I)
Application Mode: Heart Beat (O)
This signal is Open drain; it must be connected with
a 10K pull up resistor when used as Heartbeat
output.
Monitor Mode: TXDI (O)
Application Mode: NEWDATA (O)
least 5 seconds, iChip will automatically enter
monitor mode.
less than 5 seconds, it forces iChip into auto baud
rate detection.
SerialNET mode.
This pin supplies asynchronous serial receive
data for ICP (In-Circuit Programming) mode.
Provides a 50% duty cycle, 40 mSec period
square wave when iChip firmware is properly
running.
This pin supplies asynchronous serial transmit
data for ICP (In-Circuit Programming) mode.
This signal is raised when new data in one or
more sockets is available. It is lowered when any
Pin Descriptions
6-13