HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 383

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

HITACHI 370
Note:
Circled numbers refer to the preceding procedure.
Figure 13.5 Sample Flowchart for Transmitting Serial Data
Write transmit data in TDR and
as an output port with the PFC
clear TDRE bit to 0 in SSR
Select theTxD pin function
Clear TE bit of SCR to 0;
Read TDRE bit in SSR
Read TEND bit in SSR
Output break signal?
All data transmitted?
Transmission ends
Start transmitting
TDRE = 1?
TEND = 1?
Set DR = 0
Initialize
Yes
Yes
Yes
Yes
(3)
(4)
No
No
No
No
(1)
(2)