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UM1870 датащи(PDF) 11 Page - STMicroelectronics |
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UM1870 датащи(HTML) 11 Page - STMicroelectronics |
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11 / 58 page ![]() DocID027602 Rev 1 11/58 UM1870 Hardware description 58 2.1.7 LEDs Five LEDs are available (I in Figure 2). – DL1: green – DL2: orange – DL3: red – DL4: blue – DL5: yellow 2.1.8 Daughterboard interface The main feature of the motherboard is the capability to control an external board, connected to the J4 and J5 connectors (L in Figure 2). Table 1 shows which pins of the microcontroller are connected to the daughterboard. Some of the lines are connected also to a row of test points (M). a. The STM32L is preprogrammed with a DFU firmware that allows the downloading of a firmware image without the use of a programmer. If an user accidentally erases DFU firmware, he can reprogram it through STLink using the hex image DFU_Bootloader.hex available on BlueNRG-MS DK SW package, firmware folder. |
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