mc68hc908gr16 Freescale Semiconductor, Inc, mc68hc908gr16 Datasheet - Page 243

• Manufacturer Part Number: mc68hc908gr16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

The last two conditions are the forced monitor mode.
Freescale Semiconductor
PROGRAMMING
FROM
•
IS ENABLED)
DEBUGGING
CONDITIONS
AND FLASH
(IF FLASH
If $FFFE and $FFFF contain $FF (erased state):
–
–
Table 19-1
The external clock is 32.768 kHz
IRQ = V
SS
PTA1 = 0, RESET
MONITOR MODE
Figure 19-9. Simplified Monitor Mode Entry Flowchart
PTA0 = 1,
FORCED
BLANK?
YES
YES
MC68HC908GR16 Data Sheet, Rev. 5.0
NO
NO
MONITOR MODE ENTRY
MONITOR CODE
SEND 8 BYTES
DOES RESET
USER MODE
SECURITY
IS RESET
EXECUTE
POR RESET
IRQ = V
OCCUR?
NORMAL
POR?
NO
TST
?
YES
NO
YES
ENABLE FLASH
PTA0 = 1, PTA1 = 0,
MONITOR MODE
PTB0 = 1, AND
PTB1 = 0?
NORMAL
YES
YES
SECURITY BYTES
CORRECT?
ARE ALL
NO
USE ONLY
FACTORY
Monitor ROM (MON)
DISABLE FLASH
NO
243