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型號(hào)：	R4F2116BG20V
元件分類：	微控制器/微處理器
英文描述：	16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PBGA176
封裝：	13 X 13 MM, 0.80 MM PITCH, PLASTIC, LFBGA-176
文件頁(yè)數(shù)：	366/842頁(yè)
文件大小：	5188K
代理商：	R4F2116BG20V

Section 13 Serial Communication Interface (SCI)

Rev. 1.00 Mar. 02, 2006 Page 388 of 798

REJ09B0255-0100

Initialization

Start transmission/reception

Error processing

Read receive data in RDR, and

clear RDRF flag in SSR to 0

All data received?

Read TDRE flag in SSR

Write transmit data to TDR and

clear TDRE flag in SSR to 0

Read ORER flag in SSR

Read RDRF flag in SSR

Clear TE and RE bits in SCR to 0

[1] SCI initialization:

The TxD pin is designated as the

transmit data output pin, and the RxD pin

is designated as the receive data input

pin, enabling simultaneous transmit and

receive operations.

[2] SCI status check and transmit data write:

Read SSR and check that the TDRE flag

is set to 1, then write transmit data to

TDR and clear the TDRE flag to 0.

Transition of the TDRE flag from 0 to 1

can also be identified by a TXI interrupt.

[3] Receive error processing:

If a receive error occurs, read the ORER

flag in SSR, and after performing the

appropriate error processing, clear the

ORER flag to 0. Transmission/reception

cannot be resumed if the ORER flag is

[4] SCI status check and receive data read:

Read SSR and check that the RDRF flag

is set to 1, then read the receive data in

RDR and clear the RDRF flag to 0.

Transition of the RDRF flag from 0 to 1

can also be identified by an RXI

[5] Serial transmission/reception

continuation procedure:

To continue serial transmission/

reception, before the MSB (bit 7) of the

current frame is received, finish reading

the RDRF flag, reading RDR, and

clearing the RDRF flag to 0. Also, before

the MSB (bit 7) of the current frame is

transmitted, read 1 from the TDRE flag

to confirm that writing is possible. Then

write data to TDR and clear the TDRE

Note:When switching from transmit or receive operation to

simultaneous transmit and receive operations, first clear the

TE bit and RE bit to 0, then set both these bits to 1

Figure 13.20 Sample Flowchart of Simultaneous Serial Transmission and Reception

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
R4F2116VBG20V	制造商:Renesas Electronics Corporation 功能描述:MCU 3V 128K,PB-FREE 176-BGA - Trays
R4F2117VBG	制造商:Renesas Electronics Corporation 功能描述:
R4F2117VBG20V	制造商:Renesas Electronics Corporation 功能描述:
R4F2117VLP	制造商:Renesas Electronics Corporation 功能描述:
R4F2117VTE	制造商:Renesas Electronics Corporation 功能描述:MCU, FLASH, 20MHZ, 3.0 TO 3.6V - Trays

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