Toshiba H1 Series Data Book page 252

NDFMCR1
bit Symbol INTERDY
(08C2H)
Read/Write
After reset
Ready
interrupt
0: Disable
Function
1: Enable
(08C3H)
bit Symbol
Read/Write
After reset
Function
Table 3.11.2 Reed-Solomon Calculation Result Status Table
STATE<3:0>
0000
0001
0010
0011
0100~1111
Note: The <STATE3:0> value becomes effective after the calculation has started.
SEER<1:0>
00
01
10
11
Note: The <SEER1:0> value becomes effective after the calculation has ended.
(a) <SYSCKE>
The <SYSCKE> bit is used for both Hamming and Reed-Solomon codes.
When using the NDFC, this bit must be set to "1" to enable the system clock. When not
using the NDFC, power consumption can be reduced by setting this bit to "0".
(b) <ECCS>
The <ECCS> bit is used to select whether to use Hamming codes or Reed-Solomon codes.
This bit is set to "0" for using Hamming codes and to "1" for using Reed-Solomon codes. It
is also necessary to set this bit for clearing ECC.
(c) <BUSW>
The <BUSW> bit is used for both Hamming and Reed-Solomon codes.
This bit specifies the bus width of the NAND Flash to be accessed ("0" = 8 bits, "1" = 16
bits). No other setting is required in the memory controller.
(d) <INTRSC>
The <INTRSC> bit is used only for Reed-Solomon codes. When using Hamming codes,
this bit should be set to "0".
NAND Flash Control 1 Register
7 6 5
INTRSC
R/W R/W
0 0
Reed-
Solomon
calculation
end
interrupt
0: Disable
1: Enable
15 14 13
STATE3 STATE2 STATE1
0 0 0
Status read (See the table below.)
Calculation ended 0 (No error)
Calculation ended 1(5 or more symbols in error; not correctable)
Calculation ended 2 (Error found)
Calculation in progress
Meaning
1-address error
2-address error
3-address error
4-address error
92CZ26A-249
4 3
Data bus
width
0: 8-bit
1: 16-bit
12 11
STATE0 SEER1 SEER0
R
0 Undefined Undefined
Meaning
TMP92CZ26A
2 1 0
BUSW ECCS SYSCKE
R/W R/W R/W
0 0 0
Clock
ECC
control
calculation
0: Disable
0:Hamming
1: Enable
1: Reed-
Solomon
10 9 8