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3
3.3.4 Switch and LED Functions
The M3A-HS25 includes six switches and seven LEDs.
Table 3.3.5 lists switches mounted on M3A-HS25.
No.
SW1
System power on/off switch
SW2
System reset input switch
SW3
DIP switch for users
SW3-1 OFF : PB1=H, ON : PB1=L
SW3-2 OFF : PB2=H, ON : PB2=L
SW3-3 OFF : PB3=H, ON : PB3=L
SW3-4 OFF : PB5=H, ON : PB5=L
SW4
DIP switch for CPU mode setting
SW5
NMI input switch
SW6
IRQ0 input switch
Table 3.3.6 lists functions of switch SW4.
SH7125 operating mode is determined by the setting of the MD1 and FWE pins. Table 3.3.7 lists the selection of
SH7125 operating modes.
No.
Setting
SW4-1
OFF
FWE
ON
SW4-2
OFF
MD1
ON
SW4-3
OFF
TP
ON
: Initial Setting
Note: The setting of SW4-1 is activated only when the FWE pin select jumper (JP2) is set to "2-3".
SW4-1
FWE
ON
ON
OFF
OFF
: Initial Setting
Note* "Boot mode" and "User Programming mode" mean the programming mode of on-chip flash memory.
Rev.1.0 July 21, 2006
REJ10J0952-0100
Table 3.3.5Switches Mounted on M3A-HS25
Function
Table 3.3.6 Functions of Switch SW4
FWE=H (Releasing the writing/erasing protects of on-chip flash memory)
FWE=L (Setting the writing erasing protects of on-chip flash memory)
MD1 pin state "H"
MD1 pin state "L"
Test pin (H8) "H"
Test pin (H8) "L"
Table 3.3.7 Selection of SH7125 operating modes
SW4-2
MD1
Operating mode
ON
-
OFF
Mode3
ON
Mode4
OFF
Mode6
Remarks
-
ref. section 2.6
PB1, PB2, PB3 and PB5 are pulled up.
ref. section 2.4
ref. Table 3.3.6
ref. section 2.7
ref. section 2.7
Function
SH7125 Operating mode
Mode name
Setting prohibited
Single chip mode
Boot mode*
User Programming mode*
Operational Specifications
3.3.4 Switch and LED Functions
Operating mode
setting
(ref.
Table 3.3.7
)
3-16
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