Clock Setting - Renesas QB-MINI2 User Manual

4.2.5

Clock setting

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The clock signal generated by the X1 oscillator, internal high-speed oscillator, or subsystem clock oscillator can
be used for the clock signal of the target device during on-chip debugging.
Remark
(1) Using the high-speed system clock
(a) Using the clock provided in the target system
(only when OCD1A and OCD1B or TOOLD1 and TOOLC1 are used)
(b) Using the clock generated in MINICUBE2
(only when OCD0A and OCD0B or TOOLD0 and TOOLC0 are used)
(c) Using the oscillator connected to the 78K0-OCD board
(only when OCD0A and OCD0B or TOOLD0 and TOOLC0 are used)
(d) Using the oscillator circuit connected to the 78K0-OCD board
(only when OCD0A and OCD0B or TOOLD0 and TOOLC0 are used)
(2) Using the internal high-speed clock (when no restrictions are applied by the occupied pins)
(3) Using the subclock (when no restrictions are applied by the occupied pins)
The settings for (1) to (3) are described below.
(1) Using the high-speed system clock
(a) Using the clock provided in the target system (only when OCD1A and OCD1B or TOOLD1 and
TOOLC1 are used)
Remove the 78K0-OCD board oscillator or the oscillation circuit.
("System" is automatically selected for "Main Clock" in the Configuration dialog box of the debugger.)
In this case, the selected system is used for communication between MINICUBE2 and the target device.
Therefore, the download time, which depends on the communication speed, can be shortened if the 16
MHz clock for the system is specified instead of the 4 MHz clock for the system.
(b) Using the clock generated in MINICUBE2 (only when OCD0A and OCD0B or TOOLD0 and TOOLC0
are used)
Remove the 78K0-OCD board oscillator or the oscillation circuit.
("System" is automatically selected for "Main Clock" in the Configuration dialog box of the debugger.)
For details about the setting, see the debugger user's manual.
CHAPTER 4 HOW TO USE MINICUBE2 WITH 78K0 MICROCONTROLLER
MINICUBE2 can supply the clock signal for the target device instead of the X1 oscillator. Supplying
a clock signal to the subsystem clock is not supported.
User's Manual U18371EJ5V0UM
Setting up each is described below.
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