MC68HC908GP20 Datasheet, PDF (71/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

4.3.3 Internal Reset
Sources:
• Power-on reset (POR)
• Computer operating properly (COP)
• Low-power reset circuits
• Illegal opcode
• Illegal address
All internal reset sources pull the RST pin low for 32 CGMXCLK cycles
to allow resetting of external devices. The MCU is held in reset for an
additional 32 CGMXCLK cycles after releasing the RST pin.
RST PIN
CGMXCLK
INTERNAL
RESET
PULLED LOW BY MCU
32 CYCLES
32 CYCLES
Figure 4-1. Internal Reset Timing
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor
Advance Information
71