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MSM82C59A-2JS Datasheet(PDF) 13 Page - OKI electronic componets

Part # MSM82C59A-2JS
Description  PROGRAMMABLE INTERRUPT CONTROLLER
PDF  28 Pages
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Manufacturer  OKI [OKI electronic componets]
Direct Link  http://www.oki.com
Logo OKI - OKI electronic componets

MSM82C59A-2JS Datasheet(HTML) 13 Page - OKI electronic componets

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¡ Semiconductor
MSM82C59A-2RS/GS/JS
(4) Programming the MSM82C59A-2
The MSM82C59A-2 receives two types of command words generated by the CPU.
(i)
Initialization Command Words (ICW1 thru ICW4)
Before commencing normal operations, each MSM82C59A-2 in the system must be
initialized by two to four WR pulse sequence.
ICW1
Initialization Sequence
ICW2
ICW3
In
Cascade
Mode?
Is
ICW4
needed?
Interrupt request
reception preparations
completed
ICW4
No (SNGL = 1)
Yes (SNGL = 0)
Yes (IC4 = 1)
No (IC4 = 0)
Contents of Interrupt Vector Byte in 86 System Mode
D7
D6
D5
D4
D3
D2
D1
D0
IR7
T7
T6
T5
T4
T3
11
1
T7
T6
T5
T4
T3
11
0
T7
T6
T5
T4
T3
10
1
T7
T6
T5
T4
T3
10
0
T7
T6
T5
T4
T3
01
1
T7
T6
T5
T4
T3
01
0
T7
T6
T5
T4
T3
00
1
IR6
IR5
IR4
IR3
IR2
IR1
T7
T6
T5
T4
T3
00
0
IR0



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