co661al-l Connect One Ltd., co661al-l Datasheet - Page 24

• Manufacturer Part Number: co661al-l
• Description: The Co661al-l Ichip Lan? 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.

TXDH
RXDH
-CTSH /PIBF
-RTSH/-PERR
5.2.3 Host Serial Interface Signals
iChip LAN CO661AL-L Datasheet
Signal
Type
O
O
I
I
Pin No.
26
30
59
58
In Serial mode:
Transmit Data Host: This pin supplies asynchronous
serial transmit data to the host.
In Parallel mode: this pin is used for firmware update.
In Serial mode:
Receive Data Host: This pin supplies asynchronous
serial receive data from the host.
In Parallel mode: this pin is used for firmware update.
When not used, this pin should be connected to VCC.
In Serial mode:
Clear-to-Send Host: -CTSH is active only when host
hardware flow control is enabled.
When -CTSH is LOW, flow control is enabled for the
host serial port, i.e., iChip LAN may transmit to the
host.
When -CTSH is HIGH, the iChip LAN 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.
In Parallel mode:
Parallel Input Buffer Full, when HIGH, indicates that
the host has sent a data byte, which has not yet been
read.
In Serial mode:
Ready-to-Send Host: -RTSH is active only when host
hardware flow control is enabled.
When -RTSH is LOW, flow control is enabled for the
host serial port, i.e., the host may transmit to iChip
LAN. When -RTSH is HIGH, iChip LAN indicates that
its receiver is busy and cannot receive data from host.
Connect -RTSH to -CTSH when not in use.
In Parallel mode:
Parallel Error, when LOW, indicates to the host that an
error has occurred in the parallel interface circuit.
Description
Pin Descriptions
5-7