Datasheet

User’s Manual U18172EJ3V0UD
280
CHAPTER 17 ON-CHIP DEBUG FUNCTION
17.1 Connecting QB-MINI2 to 78K0S/KU1+
The 78K0S/KU1+ uses RESET, X1
Note 1
, X2
Note 2
, INTP1, VDD, and GND pins to communicate with the host machine
via an on-chip debug emulator (QB-MINI2).
Notes 1.
μ PD78F920x: X1/P23/ANI3, μ PD78F950x: EXCLK/P23
2.
μ PD78F920x: X2/P22/ANI2, μ PD78F950x: P22
Caution The 78K0S/KU1+ 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 17-1. Recommended Circuit Connection
Target connector Target device
Reset circuit
GND
RESET
Note 1
X2
Note 2
X1
Note 2
INTP1
Note 5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
RESET_OUT
RESET signal
DATA
DATA
R.F.U.
R.F.U.
H/S
Note 4
Note 3
Note 3
CLK
R.F.U.
R.F.U.
INTP
R.F.U.
CLK
RESET_IN
R.F.U.
1 kΩ
1 kΩ
10 kΩ
V DD
V DD
3 to 10 kΩ
V
DD
V DD
V DD
V DD
1 to 10 kΩ
V
DD
μPD78F920x: X2
μPD78F950x: P22
μPD78F920x: X1
μPD78F950x: EXCLK
V SS
Caution The constants described in the circuit connection example are reference values. If you
perform flash programming aiming at mass production, thoroughly evaluate whether the
specifications of the target device are satisfied.
Note 1. The RESET pin is used to download the monitor program at debugger startup or to implement
forced reset. Therefore, a pin that alternately functions as the RESET pin cannot be used. For
reset pin connection, refer to QB-MINI2 User’s Manual (U18371E).
<R>
<R>
<R>