Dbtrap" Rom Correction Unit - NEC V850E/Dx3 Preliminary User's Manual

Chapter 9
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9.2 "DBTRAP" ROM Correction Unit

• 1x 8 channels for VFB flash memory and ROM
• The individual channels of the "DBTRAP" ROM correction unit are identified
by "m" (m = 0 to 7)
• Programmable correction address for each channel
• "DBTRAP" exception processing upon correction address match
• Enable/Disable of each channel individually by software
Caution The "DBTRAP" ROM correction unit is also used by the N-Wire on-chip debug
unit. Thus ROM correction will not be performed on these correction channels
when the microcontroller is operating in N-Wire debug mode.
Correction
address register
CORADm
Comparator
CORCN.CORENm
Figure 9-1 "DBTRAP" ROM correction block diagram
Siemens VDO Preliminary User's Manual U17566EE1V2UM00
ROM Correction Function (ROMC)
VFB address bus
DBTRAP
ROM/Flash
opcode
ROM/Flash
data
DBTRAP
-
ROM/Flash data
replacement
VFB
data bus