co661al-s Connect One Ltd., co661al-s Datasheet - Page 13

• 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.

Functional Description
3.2.5 Host Connection
iChip can interface a host processor through one of two methods: Serial or Parallel.
3.2.5.1 Host Serial Connection
iChip supports a full-duplex, TTL-level serial communications link with the host
processor. Full EIA-232-D hardware flow control, including Tx, Rx, CTS, RTS, DTR,
DSR, RI and CD lines, is supported.
CO661AL-S supports standard baud rate configurations from 2,400 bps up to 230,400
bps on the host asynchronous serial communications channel. The default baud rate may
be changed permanently by using the AT+iBDRF command. Auto baud rate setting is
supported for all baud rates except 230,400.
3.2.5.2 Host Parallel Connection
iChip supports an 8-bit parallel BUS interface with some additional logic. The parallel
BUS may be defined as an 80x86 (Intel) BUS or an MC68xxx (Motorola) bus.
3.2.6 Serial Hardware and Software Flow Control
Hardware flow control is supported on a host serial connection and between iChip and a
serial modem. Flow control is programmed via the AT+iFLW command. The default
flow control methods are set to “Wait/Continue” software flow control (which is similar
to XON/XOFF software flow control) between iChip and the host, 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.
The host parallel connection has built-in hardware flow control signals as part of the
interface logic.
iChip CO661AL-S Datasheet
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