MC68HC705C Motorola, MC68HC705C Datasheet - Page 13

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MC68HC705C

Manufacturer Part Number
MC68HC705C
Description
HCMOS Microcontroller Unit
Manufacturer
Motorola
Datasheet

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MC68HC705C8A — Rev. 2.0
MOTOROLA
Technical Data — MC68HC705C8A
Figure
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10
1-11
2-1
2-2
3-1
3-2
3-3
3-4
3-5
3-6
4-1
4-2
4-3
4-4
4-5
Option Register (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . .21
MC68HC705C8A Block Diagram . . . . . . . . . . . . . . . . . . . . .23
40-Pin PDIP/Cerdip Pin Assignments . . . . . . . . . . . . . . . . .24
44-Lead PLCC/CLCC Pin Assignments . . . . . . . . . . . . . . . .25
44-Pin QFP Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . .25
42-Pin SDIP Pin Assignments . . . . . . . . . . . . . . . . . . . . . . .26
Bypassing Layout Recommendation . . . . . . . . . . . . . . . . . .27
Crystal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
2-Pin Ceramic Resonator Connections . . . . . . . . . . . . . . . .28
3-Pin Ceramic Resonator Connections . . . . . . . . . . . . . . . .29
External Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
I/O Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Programming Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Index Register (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . . . . .45
External Interrupt Internal Function Diagram . . . . . . . . . . . .50
External Interrupt Timing . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Port B I/O Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Interrupt Stacking Order . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Reset and Interrupt Processing Flowchart . . . . . . . . . . . . . .57
List of Figures
Title
List of Figures
Technical Data
Page
13

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