HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 432

• Manufacturer Part Number: HD6417034B
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 13 Serial Communication Interface (SCI)
Rev. 7.00 Jan 31, 2006 page 406 of 658
REJ09B0272-0700
Note: When switching from transmitting or receiving to simultaneous transmitting and receiving,
clear both the TE bit and the RE bit to 0, then set both this to 1 simultaneously.
Figure 13.20 Sample Flowchart for Serial Transmitting and Receiving
No
No
No
Start transmitting and receiving
Transmitting/receiving ends
Write transmit data to TDR
RDR and clear RDRF bit
Read ORER bit in SSR
Read RDRF bit in SSR
Clear TE and RE bits in
Read TDRE bit in SSR
count transmitted and
Read receive data in
and clear TDRE bit in
ORER = 1?
TDRE = 1?
RDRF = 1?
in SSR to 0
Initialization
received?
SCR to 0
SSR to 0
Total
Yes
No
Yes
Yes
Yes
Error handling
(1)
(2)
(4)
(5)
(3)