MC68306FC16 Datasheet, PDF (24/191 Pages) Motorola, Inc – Integrated EC000 Processor

Table 2-4. Interrupt and Parallel Port Signal Summary
Signal Name
Mnemonic
Input/ Three-State During
Output
Bus Arbitration
Interrupt Request Level 7, 4, 1
IRQ7, IRQ4, IRQ1
Input
—
Interrupt Request Level 6/Port B 7
IRQ6/PB7
I/O
—
Interrupt Request Level 5/Port B 6
IRQ5/PB6
I/O
—
Interrupt Request Level 3/Port B 5
IRQ3/PB5
I/O
—
Interrupt Request Level 2/Port B 4
IRQ2/PB4
I/O
—
Interrupt Acknowledge 7, 4, 1
IACK7, IACK4, IACK1 Output
—
Interrupt Acknowledge 6/Port B 7
IACK6 /PB3
I/O
—
Interrupt Acknowledge 5/Port B 6
IACK5 /PB2
I/O
—
Interrupt Acknowledge 3/Port B 5
IACK3 /PB1
I/O
—
Interrupt Acknowledge 2/Port B 4
IACK2 /PB0
I/O
—
Port A
PA7–PA0
I/O
—
NOTES:
2. Pullup or pulldown may be required, value depends on individual application.
Pullup Required
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
Table 2-5. Clock and Mode Control Signal Summary
Signal Name
Crystal Oscillator or External
Clock
Crystal Oscillator
System Clock
Address Mode
Mnemonic
EXTAL
XTAL
CLKOUT
AMODE
Input/
Output
Input
Three-State During
Bus Arbitration
—
Pullup Required
Output
—
Output
No
Input
—
2-4
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