Filter
Top Products
515
CHAPTER 22 ADDRESS MATCH DETECTION FUNCTION
Figure 22.3-5 Setting of Starting Address of Instruction Code to be Replaced by INT9 Instruction
Notes:
• When an address of other than the first byte is set to the detect address setting registers (PADR0 to
PADR5), the instruction code is not replaced by INT9 instruction and a program of an interrupt
processing is not be performed. When the address is set to the second byte or subsequent, the address
set by the instruction code is replaced by "01" (INT9 instruction code) and, which may cause
malfunction.
• The detect address setting registers (PADR0 to PADR5) should be set after disabling the address
match detection (PACSR: ADnE=0) of corresponding address match control registers. If the detect
address setting registers are changed without disabling the address match detection, the address
match detection function will work immediately after an address match occurs during writing
address, which may cause malfunction.
• The address match detection function can be used only for addresses of the internal ROM area. If
addresses of the external memory area are set, the address match detection function will not work
and the INT9 instruction will not be executed.
FF001C :
FF001F :
FF0022 :
MOVW
MOVW
MOVW
RW0,#0000
A,#0000
A,#0880
A8 00 00
4A 00 00
4A 80 08
Address Mnemonic
Instruction
code
Set to detect address (High: FF
H
, Middle: 00
H
, Low: 1F
H
)