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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST52T301 датащи(PDF) 36 Page - STMicroelectronics |
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ST52T301 датащи(HTML) 36 Page - STMicroelectronics |
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36 / 100 page  8 I/O PORT ST52x301 is provided with dedicated lines for input/output.These lines, grouped into an 8-bit I/O Port P(0:7), can be programmed to provide parallel input/output with a handshake line (READY) to carry data in/out. The I/O Port is not able to perform operations on the single bit, and the communication cannot be performed at the same time in input and output. It is possible to program the parallel port direction by using the register REG_CONF0 in order to set which bits are in input and which are in output. T he por t has an i n t er nal r egi st er (PERIPH_REG_2) dedicated to hold output data coming from the Register File through an LDPR instruction. Input data are automaticallystored in the IN_PORT register, 6-th location of the Input Register. P8 pin is a digital output line available directly connected to the OUT bit of the REG_CONF1; then it can be set by using a LDCF instruction. (see table 8.2 and Figure 8.8) PERIPH_REG_2(i) P(0:7) I/O PIN TTL CMOS IO(i) INP_PORT(i) TRISTATE REG_CONF0(i) P8 OUTPUT PIN REG_CONF1(0) OUT Figure 8.1. Figure 8.2. 36/99 ST52T301/E301 |
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