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R8C/15 датащи(PDF) 168 Page - Renesas Technology Corp

номер детали R8C/15
подробное описание детали  16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / R8C/Tiny SERIES
PDF  277 Pages
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производитель  RENESAS [Renesas Technology Corp]
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R8C/15 датащи(HTML) 168 Page - Renesas Technology Corp

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R8C/14 Group, R8C/15 Group
15. Clock Synchronous Serial I/O with Chip Select (SSU)
Rev.2.10
Jan 19, 2006
Page 156 of 253
REJ09B0164-0210
Figure 15.13
Sample Flowchart for Data Transmit (Clock Synchronous Communication Mode)
Start
Initialization
Read TDRE bit in SSSR register
SSSR register
TEND bit
← 0(1)
End
TDRE=1 ?
Write transmit data to SSTDR register
Data transmit
continued?
Read TEND bit in SSSR register
TEND=1 ?
No
Yes
Yes (2)
No
No
Yes
SSER register
TE bit
← 0
(1)
(2)
(3)
(1) After reading the SSSR register and confirming
that the TDRE bit is set to “1”, write the transmit
data to the SSTDR register. When write the
transmit data to the SSTDR register, the TDRE bit
is automatically set to “0”.
(2) Determine whether data transmit is continued
(3) When the data transmit is completed, the TEND
bit is set to “1”. Set the TEND bit to “0” and the TE
bit to “0” and complete transmit mode.
NOTES:
1. Write “0” after reading “1” to set the TEND bit to “0”.
2. When setting the microcomputer to the slave device, ensure the TEND bit is set to “1” (data transmit ends)
and write the following transmit data to the SSTDR register. When setting the microcomputer to the master
device, continuous transmit is enabled.



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