mc68hc705k1 Freescale Semiconductor, Inc, mc68hc705k1 Datasheet - Page 11

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mc68hc705k1

Manufacturer Part Number
mc68hc705k1
Description
Hcmos Microcontroller Unit
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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MC68HC705K1 — Rev. 2.0
Technical Data — MC68HC705K1
Figure
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
2-1
2-2
3-1
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3-6
4-1
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6-1
Freescale Semiconductor, Inc.
For More Information On This Product,
MC68HC705K1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . .18
Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Bypassing Layout Recommendation . . . . . . . . . . . . . . . . . . .19
Crystal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2-Pin Ceramic Resonator Connections . . . . . . . . . . . . . . . . .21
3-Pin Ceramic Resonator Connections . . . . . . . . . . . . . . . . .22
2-Pin RC Oscillator Connections . . . . . . . . . . . . . . . . . . . . . .22
3-Pin RC Oscillator Connections . . . . . . . . . . . . . . . . . . . . . .23
External Clock Connections . . . . . . . . . . . . . . . . . . . . . . . . . .24
Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
I/O Register Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Programming Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Index Register (X). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . . . . . .36
External Interrupt Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . . .45
Interrupt Stacking Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Interrupt Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Reset Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
COP Register (COPR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Stop/Wait/Halt Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Go to: www.freescale.com
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