Fujitsu F2MC-16LX Hardware Manual page 476

CHAPTER 24 ADDRESS MATCH DETECTION FUNCTION
I Setting and Operating State
❍ Initialization
2
• E PROM data are all cleared to "00
❍ Occurrence of program error
• By using the connector (UART), information about the patch program is transmitted to the
MCU (F
program and data.
• The MCU (F
❍ Reset sequence
• After reset, the MCU (F
check the presence or absence of the correction program.
• If the byte count of the patch program is not "00
addresses 0 and 1 are read and set in the detection address setting registers 0 and 1
(PADR0 and PADR1). The patch program (main body) is read according to the byte count of
the patch program and written to RAM in the MCU (F
• he patch program (main body) is allocated to the address where the patch program is
executed in the INT9 interrupt processing by the address match detection function.
• Address match detection is enabled (PACSR: AD0E = 1, AD1E = 1)
❍ INT9 Interrupt processing
• Interrupt processing is performed by the INT9 instruction. The MB90470 series has no
interrupt request flag by address match detection. Therefore, if the stack information in the
program counter is discarded, the detect address cannot be checked. When checking the
detect address, check the value of program counter stacked in the interrupt processing
routine.
• The patch program is executed, branching to the normal program.
460
2
MC-16LX) from the outside according to the allocation of the E
2
MC-16LX) stores the information received from outside in the E
2
MC-16LX) reads the byte count of the E
".
H
", the higher, middle and lower bits at detect
H
2
MC-16LX).
2
PROM patch
2
PROM.
2
PROM patch program to