MC68HC901P MOTOROLA [Motorola, Inc], MC68HC901P Datasheet - Page 63
MC68HC901P
Manufacturer Part Number
MC68HC901P
Description
Multi-Function Peripheral
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC901P.pdf
(73 pages)
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Electrical Characteristics
8-10
D0 - D7
DTACK
NOTES:
I7 - I0
I7 - I0
NOTE: Active edge is assumed to be the rising edge.
IACK
CLK
CLK
IRQ
1. IEO only goes low if no acknowledgable interrupt is pending. If IEO goes low, DTACK and
2. DTACK will go low at A
IEO
DS
IEI
the data bus remain in the high-impedance state.
low at B .
Figure 8-6. Interrupt Acknowledge Cycle (IEI High)
4
FIGURE - INTERRUPT ACKNOWLEDGE CYCLE (IEI High) TIMING
Figure 8-7. Interrupt Timing
MC68HC901 USER’S MANUAL
Figure 8-8. Port Timing
if specification number 14 is met. Otherwise, DTACK will go
FIGURE - INTERRUPT TIMING
36
25
27
FIGURE - PORT TIMING
MC68HC901UM / AD
MC68HC901UM / AD
19
MC68HC901UM / AD
20
(NOTE 1)
18
A
(NOTE 2)
18
6
B
7
17
9
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