co561ad-d Connect One Ltd., co561ad-d Datasheet - Page 20

• Manufacturer Part Number: co561ad-d
• Description: The Co561ad-d Ichip Plus? Internet Controller? Is A Low-cost Intelligent Peripheral Device That Provides Internet Connectivity Solutions To A Myriad Of Embedded Devices.
• Manufacturer: Connect One Ltd.

5.2.3 Host Interface Signals
Signal
TXDH
RXDH
-CTSH
-RTSH
-DSRH
-CDH/-RCV
iChip CO561AD-D Datasheet
Type Pin No.
O
O
O
I
I
I
30
59
58
15
60
26
Transmit Data Host: This pin supplies asynchronous
serial transmit data to the host.
Receive Data Host: This pin supplies asynchronous
serial receive data from the host.
When this pin is not used, connect it to VCC.
Clear-to-Send Host: -CTSH is active only when host
hardware flow control is enabled.
When -CTSH is LOW, flow control is enabled to the
host serial port, i.e., iChip Plus may transmit to the
host.
When -CTSH is HIGH, the iChip Plus transmitter
holds its data in the serial port transmit register.
-CTSH is sampled only at the beginning of a frame
transmission. If -CTSH is raised while a character
frame is being transmitted, that frame will be
completed.
Connect -CTSH to -RTSH when not in use.
Ready-to-Send Host: -RTSH is active only when host
hardware flow control is enabled.
When -RTSH is LOW, flow control is enabled from
the host serial port, i.e., the host may transmit to iChip
Plus. When -RTSH is HIGH, iChip Plus indicates that
its receiver is busy and cannot receive data from host.
Connect -RTSH to -CTSH when not in use.
Data Set Ready Host: When -DSRH is LOW, it
indicates that the host is attached and ready to
communicate with iChip Plus.
Connect -DSRH to GND when not in use.
In dial-up mode, this pin functions as –CDH. In LAN
mode, it functions as –RCV.
Carrier Detect Host: This pin indicates to the host that
the modem communication device detects a carrier
signal.
Receive LAN Package: When LOW, indicates that
iChip Plus may receive a data packet from the LAN
controller.
During firmware update, -CDH and -RIH are used to
display the firmware update status.
Description
Pin Descriptions
5-5