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H8/3021 Datasheet(PDF) 389 Page - Renesas Technology Corp

Part # H8/3021
Description  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3021 Datasheet(HTML) 389 Page - Renesas Technology Corp

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11. Serial Communication Interface
Rev.2.00 Mar. 22, 2007 Page 365 of 684
REJ09B0352-0200
Clear TE and RE bits
to 0 in SCR
Transmitting or receiving
No
Yes
1.
2.
3.
4.
Select the communication format in SMR.
Write the value corresponding to the bit rate in BRR.
This step is not necessary when an external clock is used.
Select communication
format in SMR
1
Set value in BRR
2
3
Set TE or RE bit to 1 in SCR
Set RIE, TIE, TEIE, and
MPIE bits as necessary
4
1 bit interval
elapsed?
Wait
Wait for at least the interval required to transmit or receive
1 bit, then set the TE or RE bit to 1 in SCR. Set the RIE,
TIE, TEIE, and MPIE bits as necessary. Setting the TE
or RE bit enables the SCI to use the TxD or RxD pin.
Start of initialization
Set CKE1 and CKE0 bits
in SCR (leaving TE and
RE bits cleared to 0)
Select the clock source in SCR. Clear the RIE, TIE, TEIE,
MPIE, TE, and RE bits to 0. If clock output is selected in
asynchronous mode, clock output starts immediately after
the setting is made in SCR.
Figure 11.4 Sample Flowchart for SCI Initialization



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