Row 3 of Table 4 shows the necessary conditions to set the MCU to External ROM-mode.
© Fujitsu Microelectronics Europe GmbH
Chapter 2 MB91FV360 Operating modes
pin value
mode byte
MD0 = 0
value is fix
MD0 = 1
MODR.ROMA = 1
MD0 = 1
MODR.ROMA = 0
operating mode
INTERNAL ROM mode
INTERNAL ROM mode
EXTERNAL ROM
mode
Table 4
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AN-910011-18