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UM1015 Switch and jumper settings
Doc ID 18124 Rev 1 15/38
4 Switch and jumper settings
4.1 Switch 1 settings
Note: When Switch SW1-x is in the ON position, the bit value is 0. When Switch 1 is in the OFF
position, the bit value is 1.
Bits 3, 4, 5 and 6 enable you to set the Functional configuration. The default configuration is
Configuration 3 . For other configurations, refer to the SPEAr320 user manual available at
www.st.com/spear.
Table 4. Switch 1 (SoC functional configuration)
Bit Description
1 Test – see Debug configuration below
2 Reserved
3 Reserved
4 Reserved
5 Reserved
6 BootSel – see Debug configuration below
Table 5. Switch 1 (debug configuration)
Test bit
Debug configuration
2 1
0 0 Normal Mode (No debug enabled)
0 1 ARM1 JTAG connected to J4
1 0 Reserved
Table 6. Switch 1 (functional configuration)
Test bit
Functional configuration
6 5 4 3
1 0 1 1 Configuration 3