Fujitsu MB904 Series Application Note page 12

The main clock supply is selected by the switches 1 and 2 of SW3. The following table show
the settings, depending whether the crystal on the crystal area is used or the clock is
supplied from the target system. Note: If the clock is supplied from the target system, the
influence of the probe cable must be considered. If a crystal is used on the target system, it
is highly recommended to use the crystal area on the emulation system.
Function
Clock supply by Crystal installed on emulator
Clock supply by clock supply on target system
Table 2.3.2.1.1 Main-Clock Switching Settings
2.3.2.2 Configuration of Sub-Clock supply
S7 is used to configure the function of the sub-clock pins. Because on some microcontrollers
the sub-clock pins are used as IO ports, the Configuration for these pins is as shown in table
2.3.2.2.1. Note: If a sub-clock crystal is used, it is highly recommended to use the sub-clock
mounted on the emulation system.
Function
Sub-clock Function
Port Function
Table 2.3.2.2.1 Configuration of Sub-clock Switching Jumper S7
2.3.2.3 C-Pin Switching
In case the C-Pin of the EVA-Chip must be connected to an external capacitor, in order to
buffer the internal core supply voltage, the following configuration must be performed.
Figure 2.3.2.3.1 C-Pin Switch Peripheral Circuit
MCU-AN-390077-E-V11
Chapter 2 Hardware Installation
S7 Setting
A-B
B-C
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SW3 Setting
SW3.1 SW3.2
OFF OFF
ON ON
SW3 Setting
SW3.3 SW3.4
OFF OFF
ON ON
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