HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 480

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

Set TE or RE bit to 1 in SCR
Set CKE1 and CKE0 bits
Transmitting or receiving
Set RIE, TIE, TEIE, and
in SCR (leaving TE and
MPIE bits as necessary
Select communication
Clear TE and RE bits
RE bits cleared to 0)
Start of initialization
Set value in BRR
format in SMR
1 bit interval
to 0 in SCR
elapsed?
Yes
Figure 13-4 Sample Flowchart for SCI Initialization
Wait
No
1
2
3
4
1.
2.
3.
4.
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.
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.
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.
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