HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 506
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HD6417660
Manufacturer Part Number
HD6417660
Description
Renesas 32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417660.pdf
(846 pages)
- Current page: 506 of 846
- Download datasheet (6Mb)
Rev. 1.00, 02/04, page 468 of 804
In serial transmission, the SCIF operates as described below.
A. When data is written into SCFTDR, the SCIF transfers the data from SCFTDR to SCTSR
B. When data is transferred from SCFTDR to SCTSR and transmission is started, consecutive
The serial transmit data is sent from the TxD pin in the following order.
C. The SCIF checks the SCFTDR transmit data at the timing for sending the stop bit. If data is
and starts transmitting. Confirm that the TDFE flag in the serial status register (SCSSR) is
set to 1 before writing transmit data to SCFTDR. The number of data bytes that can be
written is at least 64 – (transmit trigger set number).
transmit operations are performed until there is no transmit data left in SCFTDR. When the
number of transmit data bytes in SCFTDR falls to or below the transmit trigger number set
in the FIFO control register (SCFCR), the TDFE flag is set. If the TIE bit in SCSCR is set
to 1 at this time, a transmit-FIFO-data-empty interrupt (TXI) request is generated.
When the transmit data stop function is used and the number of data bytes set in the
transmit data stop register (SCTDSR) is matched, transmit operation is stopped, and the
TSF flag in the serial status register (SCSSR) is set. If the TSIE bit in the serial control
register (SCSCR) is set to 1, a transmit-data-stop-interrupt (TDI) request is generated. The
vectors of transmit-FIFO-data-empty and transmit-data-stop interrupts are the same.
a. Start bit: One 0-bit is output.
b. Transmit data: 8-bit or 7-bit data is output in LSB-first order.
c. Parity bit: One parity bit (even or odd parity) is output.
d. Stop bit(s): One or two 1-bits (stop bits) are output.
e. Mark state: 1 is output continuously until the start bit that starts the next transmission is
present, the data is transferred from SCFTDR to SCTSR, the stop bit is sent, and then serial
transmission of the next frame is started.
If there is no transmit data, the TEND flag in SCSSR is set to 1, the stop bit is sent, and
then the line goes to the mark state in which 1 is output.
A format in which a parity bit is not output can also be selected.
sent.
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