
N64S818HA
WRITE Status Register Instruction (WRSR)
This instruction provides the ability to write the status
register and select among several operating modes. Several
of the register bits must be set to a low ‘0’ if any of the other
CS
bits are written. The timing sequence to write to the status
register is shown below, followed by the organization of the
status register.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SCK
Instruction
Status Register Data In
SI
0
0
0
0
0
0
0
1
7
6
5
4
3
2
1
0
SO
High ? Z
Figure 14. WRITE Status Register Sequence
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Mode
Reserved
Hold Function
0
1
0
1
0 = Word Mode (Default)
0 = Page Mode
1 = Burst Mode
1 = Reserved
Must = 0
Figure 15. Status Register ? Data to Write
0 = Hold (Default)
1 = No Hold
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