Preliminary User’s Manual U19014EJ1V0UD
471
CHAPTER 20 ON-CHIP DEBUG FUNCTION
The
µ
PD78F0730 uses the V
DD
, FLMD0, RESET, OCD0A/X1 (or OCD1A/P31), OCD0B/X2 (or OCD1B/P32), and
V
SS
pins to communicate with the host machine via an on-chip debug emulator (QB-78K0MINI). Whether OCD0A/X1
and OCD1A/P31, or OCD0B/X2 and OCD1B/P32 are used can be selected.
Caution The
µ
PD78F0730 has an on-chip debug function, which is provided for development and
evaluation. Do not use the on-chip debug function in products designated for mass production,
because the guaranteed number of rewritable times of the flash memory may be exceeded when
this function is used, and product reliability therefore cannot be guaranteed. NEC Electronics is
not liable for problems occurring when the on-chip debug function is used.
Figure 20-1. Connection Example of QB-78K0MINI and
µ
PD78F0730
(When OCD0A/X1 and OCD0B/X2 Are Used)
V
DD
PD78F0730
µ
P31
FLMD0
OCD0A/X1
OCD0B/X2
Target reset
RESET_IN
X2
X1
FLMD0
RESET
V
DD
RESET_OUT
GND
QB-78K0MINI target connector
GND
Note
Note
Note
Make pull-down resistor 470
Ω
or more (10 k
Ω
: recommended).
Cautions 1. Input the clock from the OCD0A/X1 pin during on-chip debugging.
2. Control the OCD0A/X1 and OCD0B/X2 pins by externally pulling down the OCD1A/P31 pin.
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