read_mode
The type of read sequence that the controller will follow for pipe read commands.
| Module Instance | Base Address | Register Address |
|---|---|---|
| i_nand_config | 0xFFB80000 | 0xFFB801C0 |
Size: 32
Offset: 0x1C0
Access: RW
Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
| Bit Fields | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
|
Reserved |
|||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|
Reserved |
value RW 0x0 |
||||||||||||||
read_mode Fields
| Bit | Name | Description | Access | Reset |
|---|---|---|---|---|
| 3:0 | value |
The values in the field should be as follows[list]
[*]4'h0 - This value informs the controller that the pipe read sequence to follow is of
a normal read.
For 512 byte page devices, Normal read sequence is,
C00, Address, Data, .....
For devices with page size greater that 512 bytes, the sequence is,
C00, Address, C30, Data.....
[*]4'h1 - This value informs the controller that the pipe read sequence to follow is of
a Cache Read with the following sequence,
C00, Address, C30, C31, Data, C31, Data, ....., C3F, Data.
[*]4'h2 - This value informs the controller that the pipe read sequence to follow is of
a Cache Read with the following sequence,
C00, Address, C31, Data, Data, ....., C34.
[*]4'h3 - This value informs the controller that the pipe read sequence to follow is of
a 'N' Plane Read with the following sequence,
C00, Address, C00, Address, C30, Data, C06, Address, CE0, Data.....
[*]4'h4 - This value informs the controller that the pipe read sequence to follow is of
a 'N' Plane Read with the following sequence,
C60, Address, C60, Address, C30, C00, Address, C05, Address, CE0, Data, C00,
Address, C05, Address, CE0, Data.....
[*]4'h5 - This value informs the controller that the pipe read sequence to follow is of
a 'N' Plane Cache Read with the following sequence,
C60, Address, C60, Address, C30, C31, C00, Address, C05, Address, CE0, Data,
C00, Address, C05, Address, CE0, Data, ....., C3F, C00, Address, C05, Address,
CE0, Data, C00, Address, C05, Address, CE0, Data
[*]4'h6 - This value informs the controller that the pipe read sequence to follow is of
a 'N' Plane Read with the following sequence,
C00, Address, C32, .., C00, Address, C30, C06, Address, CE0, Data,
C06, Address, CE0, Data,....
[*]4'h7 - This value informs the controller that the pipe read sequence to follow is of
a 'N' Plane Cache Read with the following sequence,
C00, Address, C32,..., C00, Address, C30, C31,C06, Address, CE0, Data,
C31, C06, Address, CE0, Data, C3F, C06, Address, CE0, Data....
[*]4'h8 - This value informs the controller that the pipe read sequence to follow is of
a 'N' Plane Cache Read with the following sequence,
C60, Address, C60, Address, C33, C31, C00, Address, C05, Address, CE0, Data,
C00, Address, C05, Address, CE0, Data, ....., C3F, C00, Address, C05, Address,
CE0, Data, C00, Address, C05, Address, CE0, Data
[*]4'h9 - 4'h15 - Reserved.
[/list]
..... indicates that the previous sequence is repeated till the last page.
|
RW | 0x0 |