OneNAND512Mb(KFG1216U2B-xIB6)
FLASH MEMORY
2.8.19 System Configuration 1 Register F221h (R, R/W)
This Read/Write register describes the system configuration.
F221h, default =40C0h
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
-
R/W
R
RDY
pol
INT
pol
RDY
Conf
RM
BRWL
BL
ECC
IOBE
Reserved(00) WM
BWPS
Read Mode (RM)
RM
Read Mode
0
1
Asynchronous read(default)
Synchronous read
Read Mode Information[15]
Item
Definition
Description
Selects between asynchronous read mode and
synchronous read mode
RM
Read Mode
Burst Read Write Latency (BRWL)
Latency Cycles (Read/Write)
BRWL
under 40MHz
40MHz~66MHz
000~010
011
Reserved
3(up to 40MHz. min)
3(N/A)
100 (default)
101
4
5
6
7
4(min.)
5
6
7
110
111
* Default value of BRWL and HF value is BRWL=4
For host frequency range of 40MHz~66MHz, BRWL should be set to 4~7.
For host frequency under 40MHz, BRWL should be set to 3~7.
Burst Read Latency (BRL) Information[14:12]
Item
Definition
Description
Specifies the access latency in the burst
read transfer for the initial access
BRL
Burst Read Latency
41
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