Table 2-4. Interrupt And Parallel Port Signal Summary; Table 2-5. Clock And Mode Control Signal Summary - Motorola MC68306 User Manual

Table 2-4. Interrupt and Parallel Port Signal Summary

Signal Name
Interrupt Request Level 7, 4, 1
Interrupt Request Level 6/Port B 7
Interrupt Request Level 5/Port B 6
Interrupt Request Level 3/Port B 5
Interrupt Request Level 2/Port B 4
Interrupt Acknowledge 7, 4, 1
Interrupt Acknowledge 6/Port B 7
Interrupt Acknowledge 5/Port B 6
Interrupt Acknowledge 3/Port B 5
Interrupt Acknowledge 2/Port B 4
Port A
NOTES:
2. Pullup or pulldown may be required, value depends on individual application.

Table 2-5. Clock and Mode Control Signal Summary

Signal Name
Crystal Oscillator or External
Clock
Crystal Oscillator
System Clock
Address Mode
2-4
Mnemonic Output
IRQ7, IRQ4, IRQ1
IRQ6/PB7
IRQ5/PB6
IRQ3/PB5
IRQ2/PB4
Output
IACK7, IACK4, IACK1
IACK6 /PB3
IACK5 /PB2
IACK3 /PB1
IACK2 /PB0
PA7–PA0
Mnemonic Output
EXTAL
XTAL Output
CLKOUT Output
AMODE
MC68306 USER'S MANUAL
Input/ Three-State During
Bus Arbitration
Input —
I/O —
I/O —
I/O —
I/O —
—
I/O —
I/O —
I/O —
I/O —
I/O —
Input/ Three-State During
Bus Arbitration
Input —
—
No
Input —
Pullup Required
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
Pullup Required
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