HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 497

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

Figure 13-17 shows an example of SCI transmit operation.
Serial clock
Serial data
TDRE
TEND
TXI
request
Figure 13-17 Example of SCI Transmit Operation
TXI interrupt handler
writes data in TDR
and clears TDRE
flag to 0
Bit 0
Transmit
direction
Bit 1
1 frame
486
Bit 7
TXI
request
Bit 0
Bit 1
Bit 6
Bit 7
TEI
request