Datasheet

Monitor Module (MON)
MC68HC908GP32 Data Sheet, Rev. 10
Freescale Semiconductor 221
Figure 18-8. Simplified Monitor Mode Entry Flowchart
MONITOR MODE ENTRY
POR RESET
PTA0 = 1, PTA7 = 0, ,
PTC0 = 1, PTC1 = 0, AND
PTC3 = 1?
IRQ = V
TST
?
PTA0 = 1, PTA7 = 0
RESET
BLANK?
YES
NO
YES
NO
FORCED
MONITOR MODE
NORMAL
USER MODE
NORMAL
MONITOR MODE
FACTORY
USE ONLY
NO NO
SEND 8 BYTES
SECURITY
IS RESET
POR?
YES
YES
YES
NO
ARE ALL
SECURITY BYTES
CORRECT?
NO
YES
ENABLE FLASH
DISABLE FLASH
EXECUTE
MONITOR CODE
DOES RESET
OCCUR?
CONDITIONS
FROM Table 18-1
DEBUGGING
AND FLASH
PROGRAMMING
(IF FLASH
IS ENABLED)