NEC 78K0 Series User Manual page 578

CHAPTER 27 ON-CHIP DEBUG FUNCTION (
µ
The PD78F0537D uses the V
V pins to communicate with the host machine via an on-chip debug emulator (QB-78K0MINI). Whether OCD0A/X1
SS
and OCD1A/P31, or OCD0B/X2 and OCD1B/P32 are used can be selected.
µ
Caution The PD78F0537D has an on-chip debug function. Do not use this product for mass production
because its reliability cannot be guaranteed after the on-chip debug function has been used,
given the issue of the number of times the flash memory can be rewritten. NEC Electronics does
not accept complaints concerning this product.
Figure 27-1. Connection Example of QB-78K0MINI and
QB-78K0MINI target connector
RESET_IN
RESET_OUT
Note Make pull-down resistor 470 Ω or more.
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 or
by using an external circuit using the P130 pin (that outputs a low level when the device is
reset).
578
, FLMD0, RESET, OCD0A/X1 (or OCD1A/P31), OCD0B/X2 (or OCD1B/P32), and
DD
(When OCD0A/X1 and OCD0B/X2 Are Used)
FLMD0
Target reset
X1
X2
GND
V
DD
Preliminary User's Manual U17260EJ3V1UD
µ
PD78F0537D ONLY)
µ
PD78F0537D
µ
PD78F0537D
FLMD0
Note
RESET
OCD0A/X1
OCD0B/X2
GND
V
DD
P31
Note