
MC68HC08AS20
—
Rev. 4.1
Advance Information
Freescale Semiconductor
3
Advance Information — MC68HC08AS20
List of Sections
Section 1. General Description. . . . . . . . . . . . . . . . . . . . . . . . . .27
Section 2. Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Section 3. Random-Access Memory (RAM) . . . . . . . . . . . . . . .51
Section 4. Read-Only Memory (ROM) . . . . . . . . . . . . . . . . . . . .53
Section 5. Mask Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Section 6. Electrically Erasable
Programmable ROM (EEPROM) . . . . . . . . . . . .59
Section 7. Central Processor Unit (CPU). . . . . . . . . . . . . . . . . . .71
Section 8. Clock Generator Module (CGM) . . . . . . . . . . . . . . .89
Section 9. System Integration Module (SIM) . . . . . . . . . . . . . .117
Section 10. Low-Voltage Inhibit (LVI). . . . . . . . . . . . . . . . . . . .141
Section 11. Break Module (Break) . . . . . . . . . . . . . . . . . . . . . .147
Section 12. Monitor ROM (MON) . . . . . . . . . . . . . . . . . . . . . . .153
Section 13. Computer Operating Properly (COP). . . . . . . . . .163
Section 14. External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . .169
Section 15. Input/Output (I/O) Ports. . . . . . . . . . . . . . . . . . . . .177
Section 16. Timer Interface (TIM) . . . . . . . . . . . . . . . . . . . . . . .199
Section 17. Serial Communications Interface (SCI) . . . . . . . .231
Section 18. Serial Peripheral Interface (SPI) . . . . . . . . . . . . . .271