Renesas R0E521000EPB00, Руководство пользователя

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R0R521000EPB00 User’s Manual 2. Setup
REJ10J0844-0400 Rev.4.00 October 16, 2007
Page 40 of 88
2.10.3 Selecting Clock Supply
You can choose a clock supplied to the evaluation MCU by the Emulator tab in the Init dialog box of the emulator debugger.
Table 2.4 shows the clocks and their initial settings.
Table 2.4 Clock supply to the MCU and default settings
Clock Display of emulator debugger Description Default setting
Internal
Internal oscillator circuit
(OSC-3 or OSC-2)
Yes
External Oscillator of user system - Main (XIN-XOUT)
Generated
Internal generator circuit
(1.0 to 20.0 MHz)
-
Internal
Internal oscillator circuit
(32.768 kHz)
-
Sub (XCIN-XCOUT)
External Oscillator of user system Yes
IMPORTANT
Note on Changing the Clock Supply:
z
The clock supply can be set by the Init dialog box when starting up the emulator debugger or inputting CLK
command on the script window.
(1) Using an Internal Oscillator Circuit Board
1) Kinds of Oscillator Circuit Boards
The PC7501 comes with an oscillator circuit board OSC-3 (30 MHz). And an oscillator circuit board OSC-3 (20 MHz)
and an oscillator circuit board OSC-2 (bare board) are included with this product. If you use the internal oscillator
circuit board OSC-3 (20 MHz) or OSC-2 as a main clock, choose "Internal" in the emulator debugger after replacing
oscillator circuit boards in the PC7501 to change a clock supplied to an MCU.
2) Replacing an Oscillator Circuit Board
Remove the four screws of both sides of the PC7501 and lift off the upper cover (see Figure 2.17).
Figure 2.17 Removing the upper cover