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C515C Datasheet(PDF) 32 Page - Siemens Semiconductor Group

Part # C515C
Description  8-Bit CMOS Microcontroller
PDF  69 Pages
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Manufacturer  SIEMENS [Siemens Semiconductor Group]
Direct Link  http://www.siemens.com/
Logo SIEMENS - Siemens Semiconductor Group

C515C Datasheet(HTML) 32 Page - Siemens Semiconductor Group

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C515C
Semiconductor Group
32
1997-07-01
Port Structure Selection of Port 5
After a reset operation of the C515C, the quasi-bidirectional 8051-compatible port structure is
selected. For selection of the bidirectional (CMOS) port 5 structure the bit PMOD of SFR SYSCON
must be set. Because each port 5 pin can be programmed as an input or an output, additionally,
after the selection of the bidirectional mode the direction register DIR5 of port 5 must be written.
This direction register is mapped to the port 5 register. This means, the port register address is
equal to its direction register address. Figure 10 illustrates the port- and direction register
configuration.
Figure 10
Port Register, Direction Register



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