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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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ST72C171 Datasheet(PDF) 44 Page - STMicroelectronics |
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ST72C171 Datasheet(HTML) 44 Page - STMicroelectronics |
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44 / 152 page  ST72C171 44/152 OP-AMP MODULE (Cont’d) Bit 3:2 = PS2[1:0] Positive Input Select / Gain ad- just. These bits are set and reset by software and con- trol the OA2 positive input selection. t Bit 1:0 = NS2[1:0] Negative Input Select. These bits are set and reset by software and con- trol the OA2 negative input selection. OA3 CONTROL REGISTER (OA3CR) Read/Write Reset value: 0000 0000 (00h) Bit 7 = OA3ON OA3 on/off (low power) Stand Alone Op-Amp on/off control bit, it is set and reset by software. It reduces power consumption when reset. 0: Op-amp 3 off 1: Op-amp 3 on Note: This bit must be kept cleared in devices without OA3 (refer to device block diagram and pin description) Bit 6:0 = Reserved. OA2 Positive Input Gain Adj. PS21 PS20 8-step Ref.Voltage 1 inv 0 0 OA2PIN ninv 0 1 Band Gap Ref. Voltage (1.2V) inv 1 0 Floating ninv 1 1 OA2 Negative Input NS21 NS20 AGND 0 0 Floating -Repeater mode 0 1 OA2NIN 1 X 70 OA3ON - - - - --- |
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