Renesas SH7781 用户手册
27. NAND Flash Memory Controller (FLCTL)
Rev.1.00 Jan. 10, 2008 Page 1360 of 1658
REJ09B0261-0100
REJ09B0261-0100
27.3.10
Ready Busy Timeout Counter (FLBSYCNT)
FLBSYCNT is a 32-bit read-only register.
The status of flash memory read by the status read is stored in the bits STAT7 to STAT0.
The timeout time set in bits RBTMOUT20 to RBTMOUT0 in FLBSYTMR is copied to bits
RBTIMCNT20 to RBTIMCNT0 and counting down is started when the FRB pin enters the busy
state. When values in bits RBTIMCNT20 to RBTIMCNT0 are decremented to 0, 1 the BTOERB
bit in FLINTDMACR is set to 1, and the occurrence of a timeout error is notified. In this case, an
FLSTE interrupt can be issued if an interrupt is enabled by the RBERINTE bit in FLINTDMACR.
RBTIMCNT20 to RBTIMCNT0 and counting down is started when the FRB pin enters the busy
state. When values in bits RBTIMCNT20 to RBTIMCNT0 are decremented to 0, 1 the BTOERB
bit in FLINTDMACR is set to 1, and the occurrence of a timeout error is notified. In this case, an
FLSTE interrupt can be issued if an interrupt is enabled by the RBERINTE bit in FLINTDMACR.
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
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Bit:
Initial value:
R/W:
Bit:
Initial value:
R/W:
STAT[7:0]
RBTIMCNT[20:16]
RBTIMCNT[15:0]
Bit Bit
Name
Initial
Value R/W Description
Value R/W Description
31 to 24 STAT[7:0]
H'00
R
Indicate the value obtained by the status read from
flash memory
flash memory
23 to 21 —
All 0
R
Reserved
These bits are always read as 0.
20 to 0
RBTIMCNT[20:0] H'00000 R
Ready Busy Timeout Counter
When the FRB pin enters the busy state, the values
of bits RBTMOUT20 to RBTMOUT0 in FLBSYTMR
are copied to these bits. These bits are counted
down while the FRB pin is busy. A timeout error
occurs when these bits are decremented to 0.
of bits RBTMOUT20 to RBTMOUT0 in FLBSYTMR
are copied to these bits. These bits are counted
down while the FRB pin is busy. A timeout error
occurs when these bits are decremented to 0.