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Table 6-11: Clock configuration links below describes the function of the option links associated with Clock configuration. The default
configuration is indicated by BOLD text.
Clock Configuration Option Link Settings
Reference Function Fitted Not fitted Related To
R112 USB clock
oscillator
Connects the external USB clock from
the MCU
Disconnects the external USB clock
from the MCU
R120, R118, R119
R115 Clock Oscillator Connects the external clock to the
MCU.
Disconnects the external clock
connection to the MCU.
R116, R114, R122
R118 USB clock
oscillator
Connects the external USB clock to
the MCU
Disconnects the external USB clock to
the MCU
R120, R112, R119
R120 USB clock
oscillator
Connects the on-board USB clock
to the MCU.
External Clock Source can be connected. R112, R118, R119
R119 USB clock
oscillator
Connects the on-board USB clock
from the MCU.
External Clock Source can be connected. R112, R120, R118
R126 Clock Oscillator Parallel resistor for crystal.
Not fitted.
-
R122 Clock Oscillator
Connects the on-board clock from
the MCU.
External Clock Source can be connected. R115, R114, R116
R116 Clock Oscillator Connects external clock from MCU.
Disconnects the external clock
connection to the MCU.
R115, R114, R122
Table 6-11: Clock configuration links
6.9. Oscillator Sources
A crystal oscillator is fitted on the MCU board and used to supply the main clock input to the Renesas microcontroller. The oscillators
that are fitted and alternative footprints provided on this MCU board are detailed in Table 6-12: Oscillators / Resonators
Component
Crystal (X1) Fitted 12.5MHz (HC49/4H package)
Crystal (X2) Fitted 48MHz (HC49/4H package)
Table 6-12: Oscillators / Resonators
Warning: When replacing the default oscillator with that of another frequency, the debugging monitor will not function until the debugger
settings are modified.
6.10. Reset Circuit
The MCU Board includes a simple latch circuit that links the mode selection and reset circuit. This provides an easy method for swapping
the device between Boot Mode and User mode. This circuit is not required on customers’ boards as it is intended for providing easy
evaluation of the operating modes of the device on the RSK. Please refer to the hardware manual for more information on the requirements
of the reset circuit.
- To our customers 1
- User’s Manual 3
- Table of Contents 5
- Chapter 1. Preface 6
- Chapter 2. Purpose 7
- Chapter 3. Power Supply 8
- Chapter 4. Board Layout 9
- 4.2. Board Dimensions 10
- Chapter 5. Block Diagram 11
- Chapter 6. User Circuitry 12
- 6.4. Serial port 13
- 6.5. Debug LCD Module 13
- 6.6.USB Module 13
- 6.7.RCAN Module 14
- 6.8. Option Links 15
- 6.9. Oscillator Sources 20
- 6.10. Reset Circuit 20
- Chapter 7. Modes 22
- Chapter 9. Headers 24
- 9.2. Application Headers 28
- 10.1. Overview 32
- 10.2. Compiler Restrictions 32
- 10.3. Breakpoint Support 32
- 10.4. Memory Map 33
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