Renesas SH7781 用户手册
27. NAND Flash Memory Controller (FLCTL)
Rev.1.00 Jan. 10, 2008 Page 1348 of 1658
REJ09B0261-0100
REJ09B0261-0100
Bit Bit
Name
Initial
Value R/W Description
Value R/W Description
16
DOCMD1 0
R/W
First Command Stage* Execution Specification
Specifies whether the first command stage* is executed
in command access mode.
in command access mode.
0: Does not execute the first command stage
1: Executes the first command stage
15 to 0
SCTCNT
[15:0]
[15:0]
H'0000 R/W Sector
Transfer Count Specification
Specify the number of sectors to be read continuously
in sector access mode. These bits are counted down for
each sector transfer end, and stop when they reach 0.
When accessing one sector, set SCTCNT to 1.
in sector access mode. These bits are counted down for
each sector transfer end, and stop when they reach 0.
When accessing one sector, set SCTCNT to 1.
Note: * For command stage, address stage, and data stage, see figure 27.2.
27.3.3
Command Code Register (FLCMCDR)
FLCMCDR is a 32-bit readable/writable register that specifies a command to be issued in
command access or sector access.
command access or sector access.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit:
Initial value:
R/W:
Bit:
Initial value:
R/W:
CMD[15:8]
CMD[7:0]
Bit Bit
Name
Initial
Value R/W Description
Value R/W Description
31 to 16 —
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
always be 0.
15 to 8
CMD[15:8] H'00
R/W
Specify a command code to be issued in the second
command stage.
command stage.
7 to 0
CMD[7:0]
H'00
R/W
Specify a command code to be issued in the first
command stage.
command stage.