
Technical Data
MC68HC705J1A — Rev. 3.0
68
Resets and Interrupts
MOTOROLA
Resets and Interrupts
A reset immediately stops the operation of the instruction being
executed, initializes certain control and status bits, and loads the
program counter with a user-defined reset vector address. These
sources can generate a reset:
Power-on reset (POR) circuit
RESET pin
Computer operating properly (COP) watchdog
Illegal address
Figure 4-1. Reset Sources
DQ
CK
S
RESET
LATCH
INTERNAL CLOCK
RST
TO CPU AND
RESET PIN
V
DD
PERIPHERAL
MODULES
ILLEGAL ADDRESS
COP WATCHDOG
POWER-ON RESET