N-Wire Activation By Reset Pin - NEC V850ES/F 3-L Series User Manual

On-Chip Debug Unit
Power
on
RESPOC
RESET
OCDM0
DRST
Figure 23-2

23.3.3 N-Wire activation by RESET pin

Power
on
RESPOC
RESET
OCDM0
DRST
Figure 23-3
Figure 23-2. This will cause the program to restart. However the status of the
controller might not be the same as immediately after RESPOC, since the
internal RAM may have already been initialized, when the external RESET is
applied.
application software
sets OCDM.OCDM0 = 1
"0"
reset normal operation
Start with N-Wire activation
The N-Wire interface can also be activated after power up by keeping RESET
active after RESPOC is released. By this OCDM.OCDM0 is set to "1", thus the
N-Wire interface is enabled.
With this method the user's program does not need to perform
OCDM.OCDM0 = 1.
"0"
"1"
reset
>= 2 s
N-Wire activation by RESET pin
User's Manual U18743EE1V2UM00
debug
debugger starts
PC = 0
normal operation debug
Chapter 23
729