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- •Revision History
- •List of Sections
- •Table of Contents
- •List of Figures
- •List of Tables
- •Section 1. General Description
- •1.1 Contents
- •1.2 Introduction
- •1.3 Features
- •1.4 Programmable Options
- •1.5 Block Diagram
- •1.6 Pin Assignments
- •1.7 Pin Functions
- •1.7.3.1 Crystal Resonator
- •1.7.3.2 Ceramic Resonator
- •1.7.3.3 External Clock Signal
- •1.7.4 External Reset Pin (RESET)
- •1.7.5 External Interrupt Request Pin (IRQ)
- •1.7.6 Input Capture Pin (TCAP)
- •1.7.7 Output Compare Pin (TCMP)
- •1.7.8 Port A I/O Pins (PA7–PA0)
- •1.7.9 Port B I/O Pins (PB7–PB0)
- •1.7.10 Port C I/O Pins (PC7–PC0)
- •1.7.11 Port D I/O Pins (PD7 and PD5–PD0)
- •Section 2. Memory
- •2.1 Contents
- •2.2 Introduction
- •2.3 Memory Map
- •2.4 Input/Output (I/O)
- •2.6 EPROM/OTPROM (PROM)
- •2.7 Bootloader ROM
- •Section 3. Central Processor Unit (CPU)
- •3.1 Contents
- •3.2 Introduction
- •3.3 CPU Registers
- •3.3.1 Accumulator
- •3.3.2 Index Register
- •3.3.3 Stack Pointer
- •3.3.4 Program Counter
- •3.3.5 Condition Code Register
- •3.4 Arithmetic/Logic Unit (ALU)
- •Section 4. Interrupts
- •4.1 Contents
- •4.2 Introduction
- •4.3 Interrupt Sources
- •4.3.1 Software Interrupt
- •4.3.2 External Interrupt (IRQ)
- •4.3.3 Port B Interrupts
- •4.3.4 Capture/Compare Timer Interrupts
- •4.3.5 SCI Interrupts
- •4.3.6 SPI Interrupts
- •4.4 Interrupt Processing
- •Section 5. Resets
- •5.1 Contents
- •5.2 Introduction
- •5.3 Reset Sources
- •5.3.1 Power-On Reset (POR)
- •5.3.2 External Reset
- •5.3.3 Programmable and Non-Programmable COP Watchdog Resets
- •5.3.3.1 Programmable COP Watchdog Reset
- •5.3.3.2 Non-Programmable COP Watchdog
- •5.3.4 Clock Monitor Reset
- •Section 6. Low-Power Modes
- •6.1 Contents
- •6.2 Introduction
- •6.3 Stop Mode
- •6.3.1 SCI During Stop Mode
- •6.3.2 SPI During Stop Mode
- •6.3.3 Programmable COP Watchdog in Stop Mode
- •6.3.4 Non-Programmable COP Watchdog in Stop Mode
- •6.4 Wait Mode
- •6.4.1 Programmable COP Watchdog in Wait Mode
- •6.4.2 Non-Programmable COP Watchdog in Wait Mode
- •6.5 Data-Retention Mode
- •Section 7. Parallel Input/Output (I/O)
- •7.1 Contents
- •7.2 Introduction
- •7.3 Port A
- •7.3.1 Port A Data Register
- •7.3.2 Data Direction Register A
- •7.3.3 Port A Logic
- •7.4 Port B
- •7.4.1 Port B Data Register
- •7.4.2 Data Direction Register B
- •7.4.3 Port B Logic
- •7.5 Port C
- •7.5.1 Port C Data Register
- •7.5.2 Data Direction Register C
- •7.5.3 Port C Logic
- •7.6 Port D
- •Section 8. Capture/Compare Timer
- •8.1 Contents
- •8.2 Introduction
- •8.3 Timer Operation
- •8.3.1 Input Capture
- •8.3.2 Output Compare
- •8.4 Timer I/O Registers
- •8.4.1 Timer Control Register
- •8.4.2 Timer Status Register
- •8.4.3 Timer Registers
- •8.4.4 Alternate Timer Registers
- •8.4.5 Input Capture Registers
- •8.4.6 Output Compare Registers
- •Section 9. EPROM/OTPROM (PROM)
- •9.1 Contents
- •9.2 Introduction
- •9.3 EPROM/OTPROM (PROM) Programming
- •9.3.1 Program Register
- •9.3.2 Preprogramming Steps
- •9.4 PROM Programming Routines
- •9.4.1 Program and Verify PROM
- •9.4.2 Verify PROM Contents
- •9.4.3 Secure PROM
- •9.4.4 Secure PROM and Verify
- •9.4.5 Secure PROM and Dump
- •9.4.6 Load Program into RAM and Execute
- •9.4.7 Execute Program in RAM
- •9.4.8 Dump PROM Contents
- •9.5 Control Registers
- •9.5.1 Option Register
- •9.5.2 Mask Option Register 1
- •9.5.3 Mask Option Register 2
- •9.6 EPROM Erasing
- •Section 10. Serial Communications Interface (SCI)
- •10.1 Contents
- •10.2 Introduction
- •10.3 Features
- •10.4 SCI Data Format
- •10.5 SCI Operation
- •10.5.1 Transmitter
- •10.5.2 Receiver
- •10.6 SCI I/O Registers
- •10.6.1 SCI Data Register
- •10.6.2 SCI Control Register 1
- •10.6.3 SCI Control Register 2
- •10.6.4 SCI Status Register
- •10.6.5 Baud Rate Register
- •Section 11. Serial Peripheral Interface (SPI)
- •11.1 Contents
- •11.2 Introduction
- •11.3 Features
- •11.4 Operation
- •11.4.1 Pin Functions in Master Mode
- •11.4.2 Pin Functions in Slave Mode
- •11.5 Multiple-SPI Systems
- •11.6 Serial Clock Polarity and Phase
- •11.7 SPI Error Conditions
- •11.7.1 Mode Fault Error
- •11.7.2 Write Collision Error
- •11.7.3 Overrun Error
- •11.8 SPI Interrupts
- •11.9 SPI I/O Registers
- •11.9.1 SPI Data Register
- •11.9.2 SPI Control Register
- •11.9.3 SPI Status Register
- •Section 12. Instruction Set
- •12.1 Contents
- •12.2 Introduction
- •12.3 Addressing Modes
- •12.3.1 Inherent
- •12.3.2 Immediate
- •12.3.3 Direct
- •12.3.4 Extended
- •12.3.5 Indexed, No Offset
- •12.3.8 Relative
- •12.4 Instruction Types
- •12.4.1 Register/Memory Instructions
- •12.4.2 Read-Modify-Write Instructions
- •12.4.3 Jump/Branch Instructions
- •12.4.4 Bit Manipulation Instructions
- •12.4.5 Control Instructions
- •12.6 Opcode Map
- •Section 13. Electrical Specifications
- •13.1 Contents
- •13.2 Introduction
- •13.3 Maximum Ratings
- •13.4 Operating Temperature Range
- •13.5 Thermal Characteristics
- •13.6 Power Considerations
- •13.9 5.0-Volt Control Timing
- •13.10 3.3-Volt Control Timing
- •Section 14. Mechanical Specifications
- •14.1 Contents
- •14.2 Introduction
- •14.3 40-Pin Plastic Dual In-Line Package (PDIP)
- •14.4 40-Pin Ceramic Dual In-Line Package (Cerdip)
- •14.5 44-Lead Plastic-Leaded Chip Carrier (PLCC)
- •14.6 44-Lead Ceramic-Leaded Chip Carrier (CLCC)
- •14.7 44-Pin Quad Flat Pack (QFP)
- •14.8 42-Pin Shrink Dual In-Line Package (SDIP)
- •Section 15. Ordering Information
- •15.1 Contents
- •15.2 Introduction
- •15.3 MCU Order Numbers
- •Appendix A. MC68HSC705C8A
- •A.1 Contents
- •A.2 Introduction
- •A.3 5.0-Volt High-Speed DC Electrical Characteristics
- •A.4 3.3-Volt High-Speed DC Electrical Characteristics
- •A.5 5.0-Volt High-Speed Control Timing
- •A.6 3.3-Volt High-Speed Control Timing
- •A.8 3.3-Volt High-Speed SPI Timing
- •A.9 Ordering Information
- •Index
Technical Data — MC68HC705C8A
Section 4. Interrupts
4.1 Contents
4.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
4.3 Interrupt Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
4.3.1 Software Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
4.3.2 External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
4.3.3 Port B Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
4.3.4 Capture/Compare Timer Interrupts . . . . . . . . . . . . . . . . . . .55
4.3.5 SCI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
4.3.6 SPI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
4.4 Interrupt Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
4.2 Introduction
This section describes how interrupts temporarily change the normal processing sequence.
MC68HC705C8A — |
Rev. 3 |
Technical Data |
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MOTOROLA |
Interrupts |
49 |
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