Datasheet

78K0/Ix2 CHAPTER 26 ON-CHIP DEBUG FUNCTION
R01UH0010EJ0500 Rev.5.00 671
Feb 28, 2012
Figure 26-1. Connection Example of QB-MINI2 and 78K0/Ix2 Microcontrollers (1/3)
(1) When using the TOOLC0 and TOOLD0 pins (X1 oscillator or EXCLK input clock is not used, both
debugging and programming are performed)
1
2
3
4
5
6
7
8
9
GND
RESET_OUT
R.F.U.
R.F.U.
R.F.U.
TOOLD0(X2)
Note 3
11
13
15
R.F.U.
DATA
R.F.U.
8
TOOLC0(X1)
Note 3
10 k
Note 5
RxD
TxD
8
10
R.F.U.
RESET
Note 1
12
14
16
FLMD1
FLMD0
RESET
V DD
V DD
V DD
1 k
Note 5
10 k
Note 4
GND
V DD
V
DD
3 k to 10 k
Target connector
Target device
Reset connector
Note 5
RESET_IN
Note 5
CLK
Note 2
Notes 1. If there are capacitance elements such as capacitors, on-chip debugging might not operate normally.
2. A clock signal provided on the 78K0-OCD board, a 4, 8, or 16 MHz clock signal generated in QB-MINI2, or the
clock signal generated by the internal high-speed oscillator of the device can be used for the clock signal of the
target device during on-chip debugging.
Only the internal high-speed oscillator of the device can be used during flash programming.
3. During on-chip debugging, the settings specified by the user program are ignored, because these pins are used
as pins dedicated to on-chip debugging. However, if the pins are specified as input pins, the pins must be
processed (because they are left open when QB-MINI2 is not connected.)
4. This is the processing for the pin that is unused (the input is left open) when the target device operates (when
QB-MINI2 is not connected). (This processing is not required if an oscillator circuit is used.)
5. This connection is designed assuming that the reset signal is output from the N-ch open-drain buffer (output
resistance: 100  or less).