r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1110
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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21. Serial Communication Interface with FIFO (SCIF)
Figure 21.10 shows an example of the operation for transmission in asynchronous mode.
4. When modem control is enabled, transmission can be stopped and restarted in accordance with
Figure 21.11 shows an example of the operation when modem control is used.
Rev.1.00 Jan. 10, 2008 Page 1080 of 1658
REJ09B0261-0100
Idle state
(mark state)
SCIF_TXD
the SCIF_CTS input value. When SCIF_CTS is set to 1 during transmission, the SCIF goes to
the mark state after transmission of one frame. When SCIF_CTS is set to 0, the next transmit
data is output starting from the start bit.
SCIF_TXD
Serial data
SCIF_CTS
Figure 21.11 Example of Operation Using Modem Control (SCIF_CTS)
Serial
data
TDFE
TEND
1
TXI interrupt
request
Figure 21.10 Example of SCIF Transmission Operation
Start
bit
Start
bit
0
0
(Example with 8-Bit Data, Parity, One Stop Bit)
D0
Data written to SCFTDR
and TDFE read as 1 then
cleared to 0 by TXI
interrupt handler
D0
D1
D1
One frame
Data
D7 0/1
(Only in Channel 0)
Drive high before stop bit
D7
Parity
bit
Parity
bit
0/1
Stop
bit
TXI interrupt
request
Stop
bit
1
Start
bit
0
D0
D1
Start
bit
0
Data
D0 D1
D7
Parity
bit
0/1
Stop
bit
D7 0/1
1
Idle state
(mark state)
1
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