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82C55 Fiches technique(PDF) 6 Page - Intel Corporation

No de pièce 82C55
Description  CHMOS PROGRAMMABLE PERIPHERAL INTERFACE
PDF  23 Pages
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Fabricant  INTEL [Intel Corporation]
Site Internet  http://www.intel.com
Logo INTEL - Intel Corporation

82C55 Fiches technique(HTML) 6 Page - Intel Corporation

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82C55A
231256 – 7
Figure 7 Bit SetReset Format
Interrupt Control Functions
When the 82C55A is programmed to operate in
mode 1 or mode 2 control signals are provided that
can be used as interrupt request inputs to the CPU
The interrupt request signals generated from port C
can be inhibited or enabled by setting or resetting
the associated INTE flip-flop using the bit setreset
function of port C
This function allows the Programmer to disallow or
allow a specific IO device to interrupt the CPU with-
out affecting any other device in the interrupt struc-
ture
INTE flip-flop definition
(BIT-SET)INTE is SETInterrupt enable
(BIT-RESET)INTE is RESETInterrupt disable
Note
All Mask flip-flops are automatically reset during
mode selection and device Reset
6



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