co561ad-s Connect One Ltd., co561ad-s Datasheet - Page 13

• Manufacturer Part Number: co561ad-s
• Description: The Co561ad-s, Ichip? Internet Controller?, Is Part Of A Family Of Intelligent Peripheral Devices That Provide Internet Connectivity Solutions To A Myriad Of Embedded Devices.
• Manufacturer: Connect One Ltd.

11-3500-00
Functional Description
3.2.6 Serial Connection to Analog Modem
iChip CO561AD-S supports a full-duplex, TTL-level serial communications link with the
modem device. Full EIA-232-D hardware flow control, including Tx, Rx, CTS, RTS,
DTR, DSR and CD lines, is supported. It does not support the RI line.
3.2.7 Hardware and Software Flow Control
Hardware flow control is supported between the host CPU and iChip and between iChip
and the modem. Flow control is programmed via the AT+iFLW command. The default
flow control methods are set to “Wait/Continue” software flow control between iChip
and the host (this method is similar to XON/XOFF software flow control), and no flow
control between iChip and the modem.
The hardware flow control method frees the host CPU from monitoring and handling the
software flow control. The host can program iChip to either use hardware flow control or
to use “Wait/Continue” software flow control between iChip and the host CPU. The flow
control mechanism is based on the RTS/CTS signals.
Flow control between iChip and the modem can be individually programmed to hardware
flow control or no flow control.
iChip CO561AD-S Datasheet
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