Faq's; Verify Error At Address 0X1Ffff8 - Fujitsu FR Series Application Note

Chapter 3 Setting the MB91FV360 to External ROM-mode

3.7 FAQ's

3.7.1 Verify error at address 0x1FFFF8

Meaning: mode byte could not be set
Cause: CS0 not routed to external RAM
Solution: check routing of signal CS0 according Figure 4
Cause: MCU is set to invalid operating mode because of invalid mode data
Solution: set mode pin MD0 to low ( MDO at dipswitch S1 to on) and click reset button at
debugger of Softune Workbench.
Afterwards set mode pin MD0 to high ( MDO at dipswitch S1 to off) and call the batch file
(Figure 8)
© Fujitsu Microelectronics Europe GmbH
*2)
Figure 10 Verify error during setting the mode byte
- 17 -
mode byte could not
be set at external
memory
*2)
•
when mode byte is set, MCU is in internal
ROM mode
•
between 0x40000 and 0xFFFFF external
access is not possible
•
therefore external 1MB RAM is mapped to
area 0x180000 to 0x1FFFFF via CS0 and
mode byte is set at address 0x1FFFF8
instead of at address 0xFFFF8
AN-910011-18