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HD6433644R Datasheet(PDF) 351 Page - Renesas Technology Corp

Part # HD6433644R
Description  8-Bit Single-Chip Microcomputer
PDF  549 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433644R Datasheet(HTML) 351 Page - Renesas Technology Corp

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Section 10 Serial Communication Interface
Rev. 6.00 Sep 12, 2006 page 331 of 526
REJ09B0326-0600
Start
End
Read bit TDRE
in SSR
1
3
2
Set bit MPBT
in SSR
Write transmit
data to TDR
Read bit TEND
in SSR
Clear bit TE to
0 in SCR3
Set PDR = 0,
PCR = 1
Yes
TDRE = 1?
No
Continue data
transmission?
No
TEND = 1?
Break output?
No
Yes
Yes
No
Yes
Read the serial status register (SSR)
and check that bit TDRE is set to 1,
then set bit MPBT in SSR to 0 or 1 and
write transmit data to the transmit data
register (TDR). When data is written to
TDR, bit TDRE is cleared to 0 automatically.
When continuing data transmission, be
sure to read TDRE = 1 to confirm that a
write can be performed before writing data
to TDR. When data is written to TDR, bit
TDRE is cleared to 0 automatically.
If a break is to be output when data
transmission ends, set the port PCR to 1
and clear the port PDR to 0, then clear bit
TE in SCR3 to 0.
1.
2.
3.
Figure 10.22 Example of Multiprocessor Data Transmission Flowchart



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