
MC68HC05BS8
MOTOROLA
12-1
OPERATING MODES
12
OPERATING MODES
The MC68HC05BS8/
MC68HC705BS8 MCU has two modes of operation, the User Mode and the
Self-Check/
Bootstrap Mode.
Figure 12-1 shows the owchart of entry to these two modes, and
Figure 12-1 Flowchart of Mode Entering
PB6 = VDD ?
RESET
IRQ
SELF-CHECK/
MODE
USER MODE
5V
9V
?
N
Y
(NORMAL MODE)
BOOTSTRAP
Self-check mode is for MC68HC05BS8
Bootstrap mode is for MC68HC705BS8
Note:
TPG
105