HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 362
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HD6417618
Manufacturer Part Number
HD6417618
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417618.pdf
(646 pages)
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Section 14 Serial Communication Interface with FIFO (SCIF)
14.3.1
SCRSR receives serial data. Data input at the RxD pin is loaded into SCRSR in the order received,
LSB (bit 0) first, converting the data to parallel form. When one byte has been received, it is
automatically transferred to SCFRDR, the receive FIFO data register. The CPU cannot read or
write to SCRSR directly.
14.3.2
SCFRDR is a 16-stage 8-bit FIFO register that stores serial receive data. The SCIF completes the
reception of one byte of serial data by moving the received data from the receive shift register
(SCRSR) into SCFRDR for storage. Continuous reception is possible until 16 bytes are stored.
The CPU can read but not write to SCFRDR. If data is read when there is no receive data in the
SCFRDR, the value is undefined. When this register is full of receive data, subsequent serial data
is lost.
SCFRDR is initialized to undefined value by a power-on reset.
14.3.3
SCTSR transmits serial data. The SCIF loads transmit data from the transmit FIFO data register
(SCFTDR) into SCTSR, then transmits the data serially from the TxD pin, LSB (bit 0) first. After
transmitting one data byte, the SCIF automatically loads the next transmit data from SCFTDR into
SCTSR and starts transmitting again. The CPU cannot read or write to SCTSR directly.
Rev. 6.00 Jun. 12, 2007 Page 330 of 610
REJ09B0131-0600
Bit
7 to 0
Receive Shift Register (SCRSR)
Receive FIFO Data Register (SCFRDR)
Transmit Shift Register (SCTSR)
Bit Name
Initial
value
Undefined R
R/W
Description
FIFO for transmits serial data
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