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900844 データシート(PDF) 89 Page - Freescale Semiconductor, Inc |
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900844 データシート(HTML) 89 Page - Freescale Semiconductor, Inc |
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89 / 118 page  Analog Integrated Circuit Device Data Freescale Semiconductor 89 900844 FUNCTIONAL DEVICE OPERATION ADC SUBSYSTEM The ADC will be used for sensing the current through select voltage regulators, touch screen support, PMIC thermal sensor, battery voltage, current, and temperature. Figure 49 is a representation of the ADC block. Figure 49. ADC Block Representation INPUT SELECTOR The ADC has 22 input channels selected through the ADSEL[4:0] bits in the ADCADDRx register. Table 57 gives an overview of the characteristics of each of these channels. Table 57. ADC Inputs Channel SELECT[4:0] ADC Input Signal Input Level Scaling Scaled Version 0 00000 PMIC Die Temperature 1.2 – 2.4 V x1 1.2 – 2.4 V 1 00001 VCC Current Sense 0 – 2.4 V x1 0 – 2.4 V 2 00010 VNN Current Sense 0 – 2.4 V x1 0 – 2.4 V 3 00011 VCC180 Current Sense 0 – 2.4 V x1 0 – 2.4 V 4 00100 Reserved Reserved Reserved Reserved 5 00101 Reserved Reserved Reserved Reserved 6 00110 Input voltage (VBAT) 0 – 4.8 V /2 0 – 2.4 V 7 00111 Reserved Reserved Reserved Reserved |
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