co711ag Connect One Ltd., co711ag Datasheet - Page 28

• 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
6.2.4 iChip Serial Modem Signals
TXDM
RXDM
-CTSM
-RTSM
-DSRM
-DTRM
-CDM
iChip CO710AG/iChipSec CO711AG Data Sheet
Signal
Type
O
O
O
I
I
I
I
Pin No.
A11
A10
B10
H11
F10
A8
K2
Transmit Data Modem: This pin provides
asynchronous serial transmit data to the modem
from the serial port.
On reset, this pin must remain HIGH.
Receive Data Modem: This pin provides
asynchronous serial receive data from the modem to
the asynchronous modem serial port.
When this pin is not used, connect it to VDDi/o.
Clear-to-Send Modem: -CTSH is active only when
modem hardware flow control is enabled.
When -CTSM is LOW, flow control is enabled for
the modem serial port, i.e., iChip may transmit to the
modem.
When -CTSM is HIGH, the iChip transmitter holds
its data in the serial port transmit register.
Connect -CTSM to -RTSM when not in use.
Ready-to-Send Modem: -RTSM is active only when
modem hardware flow control is enabled.
When -RTSM is LOW, flow control is enabled for
the modem serial port, i.e., the modem may transmit
to iChip. When -RTSM is HIGH, iChip indicates
that its receiver is busy and cannot receive data from
modem.
Connect -RTSM to -CTSM when not in use.
Data Set Ready Modem: When -DSRM is LOW, it
indicates that the modem is attached and ready to
communicate with iChip.
Connect -DSRM to GND when not in use.
Data Terminal Ready Modem: When -DTRM is
LOW, it indicates to the modem that iChip is
attached and ready to communicate.
Carrier Detect Modem: This pin indicates to iChip
that the modem detects a carrier signal.
Description
Pin Descriptions
6-9