Hardware layout and configuration
UM1065
Doc ID 018640 Rev 4
Note:
LED LD9 is lit when the STM3221G-EVAL evaluation board is powered by 5 V correctly.
2.2 Boot
option
The STM3221G-EVAL evaluation board is able to boot from:
●
Embedded User Flash
●
System memory with boot loader for ISP
●
Embedded SRAM for debugging
The boot option is configured by setting switch SW1 (BOOT1) and SW2 (BOOT0). The
BOOT0 can be configured also via RS-232 connector CN16.
JP18
(cont.)
To select USB OTG FS (CN8) power supply, set JP18 as shown:
To select USB OTG HS (CN9)power supply, set JP18 as shown:
To select power supply jack (CN18) power supply to both
STM3221G-EVAL and daughterboard connected on CN1 and
CN3, set JP18 as shown (daughterboard must not have its own
power supply connected)
JP19
To connect Vbat to the battery, set JP19 as shown:
To connect Vbat to 3.3 V power, set JP19 as shown: (Default setting)
Table 1.
Power related jumpers and solder bridges (continued)
Jumper
Description
HS
FS
DTB
PSU
STlk
HS
FS
DTB
PSU
STlk
HS
FS
DTB
PSU
STlk
3
2
1
3
2
1
Table 2.
Boot related jumpers
BOOT 0
BOOT 1
Boot source
0
1 or 0
STM3221G-EVAL boots from User Flash (Default setting)
1
1
STM3221G-EVAL boots from Embedded SRAM
1
0
STM3221G-EVAL boots from System Memory
