HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 500

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

Figure 13-19 shows an example of SCI receive operation.
Transmitting and Receiving Serial Data Simultaneously (Synchronous Mode): Figure 13-20
shows a sample flowchart for transmitting and receiving serial data simultaneously and indicates
the procedure to follow.
Serial data
RDRF
ORER
Serial clock
RXI
request
Bit 7
Figure 13-19 Example of SCI Receive Operation
RXI interrupt
handler reads
data in RDR
and clears
RDRF flag to 0
Bit 0
Receive direction
1 frame
Bit 7
RXI
request
489
Bit 0
Bit 1
Bit 6
Overrun error,
ERI request
Bit 7