HD6417606 RENESAS [Renesas Technology Corp], HD6417606 Datasheet - Page 267

• Manufacturer Part Number: HD6417606
• Manufacturer: RENESAS [Renesas Technology Corp]

12.3.4
SCFTDR is a 16-stage 8-bit FIFO register that stores data for serial transmission. When the SCIF
detects that the transmit shift register (SCTSR) is empty, it moves transmit data written in the
SCFTDR into SCTSR and starts serial transmission. Continuous serial transmission is performed
until there is no transmit data left in SCFTDR. SCFTDR can always be written to by the CPU.
When SCFTDR is full of transmit data (16 bytes), no more data can be written. If writing of new
data is attempted, the data is ignored.
SCFTDR is initialized to undefined value by a power-on reset.
12.3.5
SCSMR is a 16-bit register that specifies the SCIF serial communication format and selects the
clock source for the baud rate generator.
The CPU can always read and write to SCSMR. SCSMR is initialized to H'0000 by a power-on
reset.
Bit
7 to 0
Bit
15 to 8
7
Transmit FIFO Data Register (SCFTDR)
Serial Mode Register (SCSMR)
Bit Name

Bit Name

C/A
Initial
value
Undefined W
Initial
value
All 0
0
R/W
R/W
R
R/W
Description
FIFO for transmits serial data
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Communication Mode
Selects whether the SCIF operates in asynchronous or
synchronous mode.
0: Asynchronous mode
1: Synchronous mode
Section 12 Serial Communication Interface with FIFO (SCIF)
Rev. 4.00 Sep. 13, 2007 Page 241 of 502
REJ09B0239-0400