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C161 Datasheet(PDF) 153 Page - Infineon Technologies AG |
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C161 Datasheet(HTML) 153 Page - Infineon Technologies AG |
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153 / 400 page  &3, 3DUDOOHO 3RUWV User’s Manual 7-27 1999-08 7.9 Port 5 This 6-bit input port can only read data. There is no output latch and no direction register. Data written to P5 will be lost. Alternate Functions of Port 5 Four lines of Port 5 are also connected to the input multiplexer of the Analog/Digital Converter. These port lines can accept analog signals (ANx) that can be converted by the ADC. For pins that shall be used as analog inputs it is recommended to disable the digital input stage via register P5DIDIS (see description below). This avoids undesired cross currents and switching noise while the (analog) input signal level is between VIL and VIH. Some pins of Port 5 also serve as external GPT timer control lines. The table below summarizes the alternate functions of Port 5. P5 3RUW 'DWD 5HJLVWHU SFR (FFA2 H/D1H) Reset Value: XXXX H 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 P5 .15 P5 .14 P5.3 P5.2 P5.1 P5.0 r r - - - - - - - - - - r r r r Bit Function P5.y Port data register P5 bit y (Read only) Read as ’1’ if the digital input stage is disabled via P5DIDIS.y = ’1’. Table 7-5 Alternate Functions of Port 5 Port 5 Pin Alternate Function a) Alternate Function b) P5.0 P5.1 P5.2 P5.3 P5.14 P5.15 Analog Input AN0 Analog Input AN1 Analog Input AN2 Analog Input AN3 - - - - T4EUD Timer 4 ext. Up/Down Input T2EUD Timer 2 ext. Up/Down Input |
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