HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 498

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

4. When modem control is enabled, transmission can be stopped and restarted in accordance with
Rev. 4.00, 03/04, page 452 of 660
Figure 16.7 shows an example of the operation for transmission.
the CTS2 input value. When CTS2 is set to 1, if transmission is in progress, the line goes to
the mark state after transmission of one frame. When CTS2 is set to 0, the next transmit data
is output starting from the start bit.
Figure 16.8 shows an example of the operation when modem control is used.
TXI interrupt
Serial
TXD2
TEND
TDFE
Serial
data
request
data
1
Figure 16.8 Example of Operation Using Modem Control (CTS2
Start
Start
bit
0
bit
0
SCFTDR2 and TDFE
flag read as 1 then
cleared to 0 by TXI
interrupt handler
Data written to
D 0
D 0
(Example with 8-Bit Data, Parity, One Stop Bit)
Figure 16.7 Example of Transmit Operation
D 1
D 1
One frame
Data
before a stop bit
Rise this point
D 7
D 7
TXI interrupt
Parity
Parity
bit
0/1
request
bit
0/1
Stop
Stop
bit
bit
1
Start
bit
0
D 0
D 1
Start
0
bit
Data
D 0
D 7
Parity
D 1
bit
0/1
CTS2
CTS2)
CTS2
Stop
bit
1
D 7
(marking)
0/1
Idling
1