x25170 IC MICROSYSTEMS, x25170 Datasheet - Page 7

• Manufacturer Part Number: x25170
• Description: Spi Serial E 2 Prom With Block Lock ? Protection
• Manufacturer: IC MICROSYSTEMS

X25170
Figure 5. Page Write Operation Sequence
Figure 6. Write Status Register Operation Sequence
Operational Notes
The X25170 powers-up in the following state:
– The device is in the low power standby state.
– A HIGH to LOW transition on CS is required to enter
– SO pin is high impedance.
– The “write enable” latch is reset.
an active state and receive an instruction.
SCK
SCK
CS
CS
SI
SI
32 33 34 35 36 37 38 39
7
6
SCK
SO
CS
0
SI
5
Data Byte 2
1
Instruction
4
2
High Impedance
3
3
0
2
4
1
1
Instruction
5
2
0
6
40 41 42 43 44 45 46 47
3
7
7
4
6
15 14 13
8
5
5
Data Byte 3
9
6
4
16 Bit Address
10
7
3
Data Protection
The following circuitry has been included to prevent
inadvertent writes:
– The “write enable” latch is reset upon power-up.
– A WREN instruction must be issued to set the “write
– CS must come HIGH at the proper clock count in order
enable” latch.
to start a write cycle.
8
7
2
20 21 22 23 24 25 26 27 28 29 30 31
3
9
6
1
2
10 11 12 13 14 15
5
0
1
4
0
Data Byte
3
6
Characteristics subject to change without notice.
7
2
5
6
Data Byte N
4
1
5
Data Byte 1
3
0
4
2
3
1
2
0
1
0
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