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QST108CB1 数据表(PDF) 16 Page - STMicroelectronics |
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QST108CB1 数据表(HTML) 16 Page - STMicroelectronics |
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16 / 51 page ![]() Device operating modes QST108 16/51 Figure 5. Stand-alone mode typical schematic 4.5.2 KOUT outputs KOUTn outputs directly reflect the state of keys. These pins are push-pull outputs except for pins KOUT7 and KOUT8 which are true open-drain outputs. Under RESET, these pins are floating and their state depends on the option resistors. Pins KOUTn are active high meaning that when a key is “touched”, the corresponding KOUT pin outputs a ‘1’. Ai12560 MOD_1/KOUT5 MOD_0/KOUT4 LP/KOUT3 AKS/KOUT2 VSS_1 VSS_2 VSS_3 VSS_4 VDD_1 VDD_2 RESET VUNREG 4.7µF 4.7µF 2.4~5.5V Volt. Reg. OM/KOUT6 KOUT7 KOUT8 MODE/KOUT1 VDD Binary- coded Output Mode 10nF VDD 10k Ω 10k Ω To Host 100nF 100nF SNS_SCK1 SNSK_SCK1 Key1 RS1 10k Ω CS1 Keep these parts close to IC SNS_SCK2 SNSK_SCK2 Key2 RS2 10k Ω CS2 SNS_SCK3 SNSK_SCK3 Key3 RS3 10k Ω CS3 SNS_SCK4 SNSK_SCK4 Key4 RS4 10k Ω CS4 SNS_SCK5 SNSK_SCK5 Key5 RS5 10k Ω CS5 SNS_SCK6 SNSK_SCK6 Key6 RS6 10k Ω CS6 SNS_SCK7 SNSK_SCK7 Key7 RS7 10k Ω CS7 SNS_SCK8 SNSK_SCK8 Key8 RS8 10k Ω CS8 1 2 3 4 5 6 8 9 101112 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 1M Ω VDD VSS KOUT6 1M Ω VDD VSS KOUT5 1M Ω VDD VSS KOUT4 1M Ω VDD VSS KOUT3 1M Ω VDD VSS KOUT2 1M Ω VDD KOUT1 VDD KOUT8 KOUT7 |
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