HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 681

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 18.4 shows an example of the operation for transmission in asynchronous mode.
• Transmit data stop function
Transmit data
TxD
When the value of the SCTDSR register and the number of transmit data match, transmit
operation stops. Setting the TSIE bit (interrupt enable bit) allows the generation of an interrupt
and activation of DMAC.
Figure 18.5 shows an example of the operation for transmit data stop function.
TSF flag
interrupt request
Transmit-FIFO-
data-empty
TEND
TDFE
Start
bit
Serial
data
0
Figure 18.5
1
D0
(Example with 8-Bit Data, Parity, One Stop Bit)
Figure 18.4
Start
cleared to 0 by Transmit-
D1
bit
0
SCFTDR and TDFE
flag read as 1 then
FIFO-data-empty
interrupt handler
Data written to
D
0
Example of Transmit Data Stop Function
D
D6
One frame
1
Data
Example of Transmit Operation
D7
D
7
Section 18
Parity
bit
Parity
interrupt request
0/1
Transmit-FIFO-
bit
0/1
data-empty
Stop
bit
Stop
bit
1
Start
bit
0
Serial Communication Interface with FIFO (SCIF)
D
Rev. 3.00 Jan. 18, 2008 Page 619 of 1458
0
D
1
Data
Start
bit
0
D
7
Parity
D0
bit
0/1
Stop
(mark state)
D1
bit
1
state
REJ09B0033-0300
Idle
1
D6
D7
0/1