User's Manual
Operational Specifications 
3.2.2 Features of Switches and LED   
Rev.1.01
 Oct.28.2008  3-18
REJ10J1351-0101 
3 
3.2.2  Features of Switches and LEDs 
The M3A-HS19 is provided with six switches and five LEDs. 
Figure 3.2.3 shows the pin assignment for switches and 
LEDs.
 Table 3.2.7 lists the switches mounted on the M3A-HS19. 
SW2
Reset 
switch
SW6
IRQ0
switch
SW5
NMI
switch
 SW4
1: MD5: L/H
2: HIFEBL: L/H
3: HIFMD: L/H
4: FLWP: L/H
 SW3
User 
DIP switch
LED1 PC04/SPEED100#
LED2 PC05/LINK#
LED3 
PC06/MII_TXD2/_CRS#
LED4 PC07/DUPLEX#
SW1
Power switch
LED5
Power LED
ON
1 2 3 4
ON
1 2 3 4
Top view of the 
component side
Figure 3.2.3 Pin assignment for Switches and LEDs 
Table 3.2.7 Switches on the M3A-HS19 
No. Description  Remarks 
SW1  System power on/off switch  - 
SW2  System reset input switch  See section 2.10 for details. 
SW3  User DIP switches (4/package) 
SW3-1 OFF: PC16 = 
"H" ON: PC16 = "L" 
SW3-2 OFF: PC17 = 
"H" ON: PC17 = "L" 
SW3-3 OFF: PC18 = 
"H" ON: PC18 = "L" 
SW3-4 OFF: PC19 = 
"H" ON: PC19 = "L" 
PC16, PC17, PC18, and PC19 are pulled up. 
See section 2.7 for details. 
SW4  Mode DIP switches (4/package)  See 
Table 3.2.8
 for features. 
SW5  NMI interrupt switch  See section 2.11 for details. 
SW6 IRQ0 switch  See section 2.11 for details. 










