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Option Link Settings
Reference Function Fitted Alternative (Removed) Related To
R113 Pin function select PIN 45 connected to AN14 on JA5
PIN 45 disconnected from AN14
R91
R133 Pin function select
PIN 30 connected to LED2
PIN 30 disconnected from LED2 R130
R130 Pin function select PIN 30 connected to A16 on JA3
PIN 30 disconnected from A16
R133
Table 6-8: Pin function configuration links
Table 6-9 below describes the function of the option links associated with Clock configuration. The default configuration is indicated by
BOLD text.
Option Link Settings
Reference Function Fitted Alternative (Removed) Related To
R107 Main OscillatorCrystal Parallel resistor for crystal
Not fitted
R109 48MHz USB
Crystal Oscillator
Parallel resistor for crystal
Not fitted
R110 Main Oscillator Source Connects on board clock to MCU External Clock Source R112,R121
R112 Main Oscillator Source Connects external clock to MCU
Disconnects external clock
connection to MCU
R110,R121
R114 48MHz USB
Crystal Oscillator
Connected to Ring Connector
Disconnected from Ring Connector
R117,
R118
R117 48MHz USB
Crystal Oscillator
Force clock Input low.
USB uses main oscillator
USB Uses 48MHz Oscillator R114,R118
R118 48MHz USB
Crystal Oscillator
Connected to Ring Connector
Disconnected from Ring Connector
R114,R117
R121 Main Oscillator Source Connects external clock to MCU
Disconnects external clock
connection to MCU
R110,R112
R129 Crystal Selection Fit if 16MHz Crystal Fitted
24MHz Crystal Fitted
R132
R132 Crystal Selection
Fit if 24MHz Crystal Fitted
16MHz Crystal Fitted R129
Table 6-9: Clock configuration links
6.7. Oscillator Sources
A crystal oscillator is fitted on the CPU board and used to supply the main clock input to the Renesas microcontroller. Another crystal
oscillator is provided to drive the USB clock. details the oscillators that are fitted and alternative footprints provided on this
CPU board
Table 6-10
:
Component
Crystal (X1) Not Fitted 48MHz (HC49/4H package)
Crystal (X2) Fitted 24MHz (HC49/4H package)
Table 6-10: Oscillators / Resonators
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