68HC805K3 Datasheet, PDF (17/119 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification
Mask Option Register
• Mask Option Register Bit to Convert STOP Instruction to Halt
Mode
• Illegal Address Reset
• Internal Steering Diode and Pullup Resistor on RESET Pin to V_DD
• Internal RESET Pin Pulldown from COP Watchdog and ILADR
NOTE: A line over a signal name indicates an active low signal. For example,
RESET is active high and RESET is active low.
Any reference to voltage, current, or frequency specified in the following
sections refers to the nominal values. The exact values and their
tolerance or limits are specified in Section 12. Electrical
Specifications.
1.4 Mask Option Register
The MC68HC805K3 contains these nine programmable options:
NOTE:
1. COP Watchdog Timer (Enable or Disable)
2. IRQ Triggering (Edge-Sensitive or Edge- and Level-Sensitive)
3. Port A Interrupts (Enable or Disable)
4. Port Software Programmable Pulldowns (Enable or Disable)
5. STOP Instruction (Enable or Disable)
6. Oscillator Type (Crystal/Ceramic Resonator or RC)
7. RC Oscillator Type (2-Pin or 3-Pin)
8. RC Oscillator Startup Delay (4064 or 16 f_OP Cycles)
9. User EEPROM and PEEP Security (Enable or Disable)
The startup delay of 16 f_OP cycles and the crystal/ceramic resonator
oscillator should not be selected together.
MC68HC805K3 — Rev. 1.0
General Description
17
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