Renesas M3A-HS37 사용자 설명서

Operational Specifications 

3.2.4 Switches and LEDs 

Rev.1.00 Oct 09, 2008 

3-20

REJ11J0021-0100  

 

 

 

3 

3.2.4  Switches and LEDs 

 

The M3A-HS37 is provided with six switches and seven LEDs. 

 

Table 3.2.4 Switches on the M3A-HS37 

No. Function 

Remarks 

SW1 

System power on/off switch 

- 

SW2 

System reset input switch 

Refer to Section 2.9 for details. 

SW3 

User DIP switches (4/package) 

SW3-1 OFF: PF12 = ”H” ON: PF12 = ”L” 

SW3-2 OFF: PF13 = ”H” ON: PF13 = ”L” 

SW3-3 OFF: PF14 = ”H” ON: PF14 = ”L” 

SW3-4 OFF: PF15 = ”H” ON: PF15 = ”L” 

PF12,PF13,PF14, and PF15 are pulled up. 

Refer to Section 2.5 for details. 

SW4 

System setting DIP switches (4/package) 

SW5 

NMI input switch 

Refer to Section 2.10 for details. 

SW6 

IRQ2 input switch 

Refer to Section 2.10 for details. 

 

Table 3.2.5 lists the functions of the switch (SW4). The SH7137 operating mode is set by the combinations of the pins FEW, 

MD0, and MD1. Table 3.2.6 lists the SH7137 operating mode setting.   

 

Table 3.2.5 Functions of Switch (SW4) 

No. Setting 

Function 

OFF 

FWE="H" (On-chip flash memory is write- and erase-protected) 

SW4-1 

FWE 

ON 

FWE="L" (On-chip flash memory is write- and erase-enabled) 

OFF 

MD1 pin state is "H" 

SW4-2 

MD1 

ON 

MD1 pin state is "L" 

OFF 

MD0 pin state is "H" 

SW4-3 

MD0 

ON 

MD0 pin state is "L" 

Operating mode setting

 (Refer to Table 3.2.6) 

OFF 

LED Vcc OFF 

SW4-4 

LED 

ON 

LED Vcc ON 

 

     indicates the default setting. 

Note: Refer to Figure 2.5.1 for LED Vcc. 

 

Table 3.2.6 SH7137 Operating Mode Setting 

SH7137 Operating Mode 

SW4-1 

(FWE) 

SW4-2 

(MD1) 

SW4-3

(MD0)

No. Name 

ON 

ON 

ON 

Mode 0 

MCU expansion mode 0 (On-chip ROM disabled, CS0 space: 8-bit bus)

ON 

OFF 

ON 

Mode 2 

MCU expansion mode 2 (On-chip ROM enabled, CS0 space: 8-bit bus)

ON 

OFF 

OFF 

Mode 3 

Single chip mode (On-chip ROM enabled) 

OFF ON ON 

Mode 

4

 *

 

Boot mode (On-chip ROM enabled) 

OFF ON OFF 

Mode 

5

 *

 

User boot mode (On-chip ROM enabled, CS0 space: 8-bit bus) 

OFF OFF ON 

Mode 

6

 *

 

User program mode (On-chip ROM enabled, CS0 space: 8-bit bus) 

OFF OFF OFF 

Mode 

7

 *

 

User program mode (On-chip ROM enabled) 

     Indicates the default setting. 

Note: These are the programming mode of the flash memory