mc68hc05bs8 Freescale Semiconductor, Inc, mc68hc05bs8 Datasheet - Page 107

• Manufacturer Part Number: mc68hc05bs8
• Description: Mc68hc05 Family Of Low-cost Single-chip Microcontrollers.
• Manufacturer: Freescale Semiconductor, Inc

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