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EMDB65XX Datasheet(PDF) 7 Page - EM Microelectronic - MARIN SA |
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EMDB65XX Datasheet(HTML) 7 Page - EM Microelectronic - MARIN SA |
7 / 9 page ![]() EMDB65xx Copyright © 2005, EM Microelectronic-Marin SA 7 www.emmicroelectronic.com EM MICROELECTRONIC - MARIN SA 7. SIGNALS NOTES 7.1 VDD Several jumpers are used to allow different configurations (run / prog. mode / current meas.). Capacitor 100nF (decoupling) is placed as close as possible to MCU. A 47uF capacitor is also used with jumper. It allow to power the application only with this capacitor. Figure 5: VDD selection 7.2 RESET Weak pull-down is added. With push-button to force internal reset and available on external connection (only footprint). Figure 6: Reset connection 7.3 VSS Common ground 7.4 TEST Weak pull-down can be added(only footprint). 7.5 QIN / SDIO AND QOUT/SCLK A 32768Hz Xtal has to be connected as close as possible to MCU. Near each MCU footprint, a Xtal footprint is placed. 2 footprints 0805 are present (just in case) for optional Xtal capacitor. Figure 7: Xtal connections 7.6 VREG AND VREG/VPP A 100nF is placed between VREG and VSS. E M 6 5 x x Q IN Q O U T G N D G N D EM65xx RESET 1 0 0 K GND VDD S1 RESET_EXT RESET_PROG VDD_APPLI VDD_MCU 47u 100n VDD_BAT VDD_EXT VDD_PROG JP12 (3-4) JP12 (1-2) JP13 JP14 |
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