MC68HC705 MOTOROLA [Motorola, Inc], MC68HC705 Datasheet - Page 6

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MC68HC705

Manufacturer Part Number
MC68HC705
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet

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Table of Contents
Technical Data
6
2.5
2.6
2.7
3.1
3.2
3.3
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.4
4.1
4.2
4.3
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.4
5.1
5.2
RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
EPROM/OTPROM (PROM) . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Bootloader ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Arithmetic/Logic Unit (ALU) . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Interrupt Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Interrupt Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Index Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Stack Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Condition Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Software Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Port B Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Capture/Compare Timer Interrupts . . . . . . . . . . . . . . . . . . .53
SCI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
SPI Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Section 3. Central Processor Unit (CPU)
Table of Contents
Section 4. Interrupts
Section 5. Resets
MC68HC705C8A — Rev. 2.0
MOTOROLA

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