co661al-d Connect One Ltd., co661al-d Datasheet - Page 16

• Manufacturer Part Number: co661al-d
• Description: Co661al-d Ichip Plus? 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.

4.2.2 MC68xxx BUS
This BUS type includes the following signals:
iChip Plus CO661AL-D Datasheet
• -HCS:
• -HR/-W: Host read/write data from/to iChip Plus. When HR/-W is LOW, it
• HD0 – HD7:
• -HRES: Parallel reset. A LOW generates a reset signal to the parallel interface.
• -HERR: Parallel error. A LOW indicates a parallel interface error. This pin may
• HOBE
• HIBF
Note 1: HOBE and HIBF complement PIBF and POBE respectively.
1
: Host Input Buffer Full. When HIGH, indicates that the input buffer is
1
: Host Output Buffer Empty. When HIGH, indicates that the output buffer
Host Chip-Select signal. When -HCS is LOW, PAL is selected.
indicates a write cycle; otherwise it is a read cycle.
Bi-directional Host data BUS.
This pin may be connected to an MC68xxx output port.
be connected to an input port on the 80x86.
is empty and the host may send a data byte to iChip Plus. When the Host
sends a data byte, this signal goes LOW until iChip Plus reads the data.
This signal may be connected to an interrupt or I/O pin on the MC68xxx.
full and the host may read a data byte from iChip Plus. When the host
reads the data, this signal goes low. This pin may be connected to an
interrupt or I/O pin on the MC68xxx.
MC68302
Host
HD0-HD7
-ERROR
HR/-W
-HRES
Figure 4-2 Interface to an MC68xxx Type BUS
HOBE
HIBF
-HCS
EPM7032AEC44
PAL
Hardware Interface
POBE
PIBF
PCS
-RD
-WR
D0-D7
-PRES
-PERR
CO661AL-D
iChip Plus
4-3