M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 727

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20.3 ROM Correction Operation and Program Flow
<1> If the address to be corrected and the fetch address of the internal ROM match, the fetch code is replaced by
<2> When the DBTRAP instruction is executed, execution branches to address 00000060H.
<3> Software processing after branching causes the result of ROM correction to be judged (the fetch address and
<4> After the correction software has been executed, the return address is set, and return processing is started
Cautions 1. The software that performs <3> and <4> must be executed in the internal ROM/RAM.
the DBTRAP instruction.
ROM correction operation are confirmed) and execution to branch to the correction software.
by the DBRET instruction.
2. When setting an address to be corrected to the CORADn register, clear the higher bits to 0 in
3. The ROM correction function cannot be used to correct the data of the internal ROM. It can
4. Use of ROM correction is prohibited if self-programming is performed in the
5. ROM correction cannot be used when DMA transfer is executed in the internal RAM (do not
accordance with the capacity of the internal ROM.
only be used to correct instruction codes. If ROM correction is used to correct data, that data
is replaced with the DBTRAP instruction code.
(V850E/IA3) or 70F3186 (V850E/IA4).
execute DMA transfer in the internal RAM and instructions in the internal RAM at the same
time).
CHAPTER 20 ROM CORRECTION FUNCTION
User’s Manual U16543EJ4V0UD
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PD70F3184
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