MC68HC05K1 FREESCALE [Freescale Semiconductor, Inc], MC68HC05K1 Datasheet - Page 13

• Manufacturer Part Number: MC68HC05K1
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

MC68HC05K0 • MC68HC05K1 — Rev. 2.0
Technical Data — MC68HC05K0 • MC68HC05K1
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Freescale Semiconductor, Inc.
For More Information On This Product,
MC68HC05K0 and MC68HC05K1 Block Diagram. . . . . . . .20
Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Bypassing Layout Recommendation . . . . . . . . . . . . . . . . . .22
Crystal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2-Pin Ceramic Resonator Connections . . . . . . . . . . . . . . . .24
3-Pin Ceramic Resonator Connections . . . . . . . . . . . . . . . .24
2-Pin RC Oscillator Connections . . . . . . . . . . . . . . . . . . . . .25
3-Pin RC Oscillator Connections . . . . . . . . . . . . . . . . . . . . .26
External Clock Connections . . . . . . . . . . . . . . . . . . . . . . . . .27
Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Control, Status, and Data Registers. . . . . . . . . . . . . . . . . . .32
Programming Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Index Register (X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . . . . .40
External Interrupt Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
IRQ Status and Control Register (ISCR) . . . . . . . . . . . . . . .48
Interrupt Stacking Order . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Interrupt Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Reset Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
COP Register (COPR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Stop/Wait/Halt Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Port A Data Register (PORTA). . . . . . . . . . . . . . . . . . . . . . .66
Go to: www.freescale.com
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