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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RM0319 датащи(PDF) 261 Page - STMicroelectronics |
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RM0319 датащи(HTML) 261 Page - STMicroelectronics |
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261 / 368 page  RM0319 Basic general purpose I/Os (basGPIO) Doc ID 022640 Rev 3 261/368 22 Basic general purpose I/Os (basGPIO) This chapter focuses on GPIO functionality and operation. For technical details about the programmable registers related to the GPIO, refer to the GPIO registers in the following companion document: ● RM0321: SPEAr320S address map and registers 22.1 Overview The general purpose input/output block provides 6 programmable inputs or outputs. Each input/output can be controlled through an APB interface. 22.2 Main features ● Six individually programmable input/output pins (default to input at reset) ● Two additional GPIOs dedicated for SPI chip select ● An APB slave acting as control interface ● Programmable interrupt generation capability on any number of pins. ● Bit masking in both read and write operation through address lines. 22.3 Functional description Figure 92 shows the block diagram of GPIO. Figure 92. GPIO block diagram 22.3.1 Pins The GPIO directly interfaces with the signals summarized in Table 74: GPIO signal interface. A functional diagram of these signal interfaces is given in Figure 93. Interrupt Detection logic Input/ Output Multiplexor Input Data Enable lines Output Data AMBA APB Interface |
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