Renesas R5S72621 User Manual
Section 25 NAND Flash Memory Controller
R01UH0134EJ0400 Rev. 4.00
Page 1315 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
25.3.13
Transfer Control Register (FLTRCR)
Setting the TRSTRT bit to 1 initiates access to flash memory. Access completion can be checked
by the TREND bit. During the transfer (from when the TRSTRT bit is set to 1 until the TREND
bit is set to 1), the processing should not be forcibly ended (by setting the TRSTRT bit to 0).
by the TREND bit. During the transfer (from when the TRSTRT bit is set to 1 until the TREND
bit is set to 1), the processing should not be forcibly ended (by setting the TRSTRT bit to 0).
When reading from flash memory, TREND is set when reading from flash memory have been
finished. However, if there is any read data remaining in the FIFO, the processing should not be
forcibly ended until all data has been read from the FIFO. While this module has the external bus
mastership and transfer is in progress, the SLEEP instruction should not be executed until the
TREND bit is set and transfer is completed.
finished. However, if there is any read data remaining in the FIFO, the processing should not be
forcibly ended until all data has been read from the FIFO. While this module has the external bus
mastership and transfer is in progress, the SLEEP instruction should not be executed until the
TREND bit is set and transfer is completed.
Bit:
Initial value:
R/W:
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R/W
R/W
-
-
-
-
-
TR
STAT
TR
END
TR
STRT
Bit Bit
Name
Initial
Value R/W
Value R/W
Description
7 to 3
All
0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
always be 0.
2 TRSTAT
0
R
Transfer
State
Indicates that this module has acquired the external bus
mastership and that transfer is actually being
performed.
mastership and that transfer is actually being
performed.
0: Transfer has not been started.
1: Transfer is in progress or transfer has ended.
1
TREND
0
R/W
Processing End Flag Bit
Indicates that the processing performed in the specified
access mode has been completed. The write value
should always be 0.
access mode has been completed. The write value
should always be 0.
0 TRSTRT
0
R/W
Transfer
Start
By setting this bit from 0 to 1 when the TREND bit is 0,
processing in the access mode specified by the access
mode specification bits ACM[1:0] is initiated.
processing in the access mode specified by the access
mode specification bits ACM[1:0] is initiated.
0: Stops transfer
1: Starts transfer