參數資料
型號: Q67121-C942
廠商: SIEMENS AG
英文描述: 16-Bit CMOS Single-Chip Microcontroller
中文描述: 16位CMOS單芯片微控制器
文件頁數: 32/69頁
文件大?。?/td> 1124K
代理商: Q67121-C942
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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