HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 675
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HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417320.pdf
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18.3.12 Transmit Data Stop Register (SCTDSR)
SCTDSR is an 8-bit readable/writable register that sets the number of data to be transmitted. This
register is available when the TSE bit in the FIFO control register (SCFCR) is enabled. The
transmit operation stops after all data set by this register have been transmitted. Settable values are
H'00 (1 byte) to H'FF (256 bytes). The initial value of this register is H'FF.
18.4
For serial communication, the SCIF has asynchronous mode in which characters are synchronized
individually and synchronous mode in which synchronization is achieved with clock pulses. The
SCIF has the 64-byte FIFO buffer for both transmission and reception, reduces an overhead of the
CPU, and enables continuous high-speed communication.
18.4.1
Operation in asynchronous mode is described below.
The transmission and reception format is selected in the serial mode register (SCSMR), as listed in
table 18.2. The clock source of SCIF is determined by the combination of CKE1 and CKE0 bits in
the serial control register (SCSCR).
• Data length is selectable from seven or eight bits.
• Parity and multiprocessor bits are selectable. So is the stop bit length (one or two bits). The
• In receiving, it is possible to detect framing errors, parity errors, overrun errors, receive FIFO
• The number of stored data for both the transmit and receive FIFO registers is displayed.
• Clock source: Internal clock/external clock
combination of the preceding selections constitutes the communication format and character
length.
data full, receive data ready, and breaks.
Internal clock: SCIF operates using the on-chip baud rate generator
External clock: The clock appropriate for the sampling rate should be input. For example,
when the sampling rate is 1/16, input the clock frequency 8 times the bit rate. (The internal
baud rate generator should not be used.)
Operation
Asynchronous Mode
Section 18
Serial Communication Interface with FIFO (SCIF)
Rev. 3.00 Jan. 18, 2008 Page 613 of 1458
REJ09B0033-0300
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