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4.3 Switches

Figure 4.2 shows the locations of switches of the M34282T5-OPT and Tables 4.2 and 4.3 list the

functions of each switch and its factory-settings.

Figure 4.2 Switch locations

Table 4.2 Functions of switches (1/2)

Description Factory-settingSwitch settingSwitch
SW1
SW2
SW3
SW4
OFF
ON
L
H
HH
L
CPUSEL1
OFF
ON
OFF
H
H
Does not output the VDD from the
M34282T5-OPT to the target system.
Outputs the VDD from the M34282T5-
OPT to the target system.
Sets the ROM type of MCU.
For M1: "L"
For M2: "H"
This switch is not used.
Do not change the CPUSEL1 setting.
The pulldown resistors of ports G0
and G1 are OFF.
The pulldown resistors of ports G0
and G1 are ON.
OFF
ON
OFF
ON
OFF
H
L
CPUSE0
H
L
CPUEL0
ON OFF
VDD
ON OFF
VDD