23a256 Microchip Technology Inc., 23a256 Datasheet - Page 11

• Manufacturer Part Number: 23a256
• Description: 256k Spi Bus Low-power Serial Sram
• Manufacturer: Microchip Technology Inc.

2.6
The Write Status Register instruction (WRSR) allows the
user to write to the bits in the STATUS register as
shown in Table 2-2. This allows for setting of the Device
operating mode. Several of the bits in the STATUS
register must be cleared to ‘0’. See Figure 2-8 for the
WRSR timing sequence.
FIGURE 2-8:
2.7
The 23X256 powers on in the following state:
• The device is in low-power Standby mode
• A high-to-low-level transition on CS is required to
© 2009 Microchip Technology Inc.
SCK
(CS = 1)
enter active state
SO
CS
SI
Write Status Register Instruction
(WRSR)
Power-On State
0
0
WRITE STATUS REGISTER TIMING SEQUENCE (WRSR)
0
1
0
Instruction
2
0
3
0
4
0
5
High-Impedance
Preliminary
0
6
1
7
7
8
6
9
Data to STATUS Register
10
5
23A256/23K256
11
4
12
3
13
2
14
1
DS22100C-page 11
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0