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CHAPTER 20 UART/SIO
20.7
Explanation of UART/SIO Operations and Setup Procedure
Example
The UART/SIO has a serial communication function (operation mode 0, 1).
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Operation of UART/SIO
●
Operation mode
Two operation modes are available in the UART/SIO. Clock synchronous mode (SIO) or clock
asynchronous mode (SUAR) can be selected (see Table 20.7-1).
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Setup Procedure Example
The UART/SIO is set up in the following procedure.
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Initial setup
1) Set the port input. (DDR1)
2) Set the interrupt level. (ILR1)
3) Set the prescaler. (PSSR)
4) Set the baud rate. (BRSR)
5) Select the clock. (SMC10:CKS)
6) Set the operation mode. (SMC10:MD)
7) Enable/disable the serial clock output. (SMC20:SCKE)
8) Enable reception. (SMC20:RXE = 1)
9) Enable interrupts. (SMC20:RIE = 1)
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Interrupt processing
1) Read receive data. (RDR0)
Table 20.7-1 Operation Modes of UART/SIO
Operation mode
Data length
Synchronization
mode
Length of stop bit
No parity
With parity
0
5
6
Asynchronous
1 bit or 2 bits
6
7
7
8
8
9
1
5
-
Synchronous
-
6
-
7
-
8
-
Содержание F2 MC-8FX Family
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Страница 30: ...16 CHAPTER 1 DESCRIPTION 1 FPT 64P M23 FPT 64P M24 2 For the I O circuit type refer to 1 8 I O Circuit Type ...
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Страница 35: ...21 CHAPTER 2 HANDLING DEVICES This chapter gives notes on using 2 1 Device Handling Precautions ...
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Страница 39: ...25 CHAPTER 3 MEMORY SPACE This chapter describes memory space 3 1 Memory Space 3 2 Memory Map ...
Страница 43: ...29 CHAPTER 4 MEMORY ACCESS MODE This chapter describes the memory access mode 4 1 Memory Access Mode ...
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Страница 105: ...91 CHAPTER 8 INTERRUPTS This chapter explains the interrupts 8 1 Interrupts ...
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