144-Bit Parallel Digital I/O Card

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Item: ACL-7122

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The 8255 PPI controls 24 bits of digital I/O. It has three 8-bit ports (A, B and C), which can be functionally programmed as either input or output. Ports A and B are always used for digital I/O, while Port C can be configured for digital I/O, control, status or handshaking signals.

Although the 8255 has 3 modes of operation, the ACL-7122 only emulates Mode 0 of the PPI. This mode provides simple input and output for each of the three ports. No handshaking is required as data is directly written to or read from a specified port.

PC/AT Bus
IRQ Level: IRQ3, ..., IRQ15
Compact Sized PCB
SMT Component Design
144 TTL/DTL Compatible Digital I/O Channels
Emulates Six Industry Standard Mode 0 8255 PPI
Buffered Circuits for High Driving Capability
Direct Interface with OPTO-22 Compatible I/O Modules and Racks
Programmable Interrupt Handling
Output Status Readback
Fully Compatible with ACL-722 and Advantech's PCL-722

Manual	ACL-7122
DOS Drivers	Borland C Library
Windows 3.1 drivers Labview drivers	ACLS-DLL1 ACLS-LVIEW
W95/W98 drivers Labview drivers	ACLS-DLL1 ACLS-LVIEW
NT/2000 drivers Labview drivers	ACLS-DLL1 ACLS-LVIEW

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