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CHAPTER 20 UART/SIO
20.5.4
UART/SIO Serial Input Data Register (RDR0)
The UART/SIO serial input data register (RDR0) is used to input (receive) serial data.
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UART/SIO Serial Input Data Register (RDR0)
Figure 20.5-5 shows the bit configuration of the UART/SIO serial input data register.
Figure 20.5-5 UART/SIO Serial Input Data Register (RDR0)
This register stores received data. The serial data signals sent to the serial data input pin (UI0 pin) is
converted by the shift register and stored in this register.
When received data is set correctly in this register, the receive data register full (RDRF) bit is set to "1". At
this time, an interrupt occurs if reception interrupt requests have been enabled. If an RDRF bit check by the
program or using an interruption shows that received data is stored in this register, the reading of the
content for this register clears the RDRF flag to "0".
When the character bit length (CBL1, 0) is set to shorter than 8 bits, the excess upper bits (beyond the set
bit length) are set to "0".
Address
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Initial value
005A
H
RDR0
RD7
RD6
RD5
RD4
RD3
RD2
RD1
RD0
00000000
B
R/WX R/WX R/WX R/WX R/WX R/WX R/WX R/WX
R/WX: Read only (Readable, writing has no effect on operation)
Содержание F2 MC-8FX Family
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Страница 34: ...20 CHAPTER 1 DESCRIPTION ...
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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