CAT25256ZD2I-GT2 ON Semiconductor, CAT25256ZD2I-GT2 Datasheet - Page 10

• Manufacturer Part Number: CAT25256ZD2I-GT2
• Description: EEPROM 256KB SPI SER CMOS EEPROM
• Manufacturer: ON Semiconductor

Specifications of CAT25256ZD2I-GT2

• Rohs: yes
• Memory Size: 256 Kbit
• Organization: 32 x 8
• Data Retention: 100 yr
• Maximum Clock Frequency: 1000 KHz
• Maximum Operating Current: 2 mA
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TDFN-8
• Interface Type: SPI
• Minimum Operating Temperature: - 40 C

Write Status Register
instruction according to timing shown in Figure 7. Only bits
2, 3, 4, 6 and 7 can be written using the WRSR command.
SCK
SO
CS
The Status Register is written by sending a WRSR
SI
Dashed Line = mode (1, 1)
SCK
WP
WP
CS
Dashed Line = mode (1, 1)
0
0
0
1
HIGH IMPEDANCE
0
2
0
3
OPCODE
0
4
0
5
Figure 7. WRSR Timing
Figure 8. WP Timing
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6
1
7
10
t
WPS
MSB
7
8
Write Protection
Block Protect bits BP0 and BP1 against being inadvertently
altered. When WP is low and the WPEN bit is set to “1”,
write operations to the Status Register are inhibited. WP
going low while CS is still low will interrupt a write to the
status register. If the internal write cycle has already been
initiated, WP going low will have no effect on any write
operation to the Status Register. The WP pin function is
blocked when the WPEN bit is set to “0”. The WP input
timing is shown in Figure 8.
The Write Protect (WP) pin can be used to protect the
t
9
6
WPH
10
5
11
4
DATA IN
12
3
13
2
14
1
15
0