CAT25010LET3 datasheet(8/17 Pages) CATALYST

Part #	CAT25010LET3

Description	1-Kb, 2-Kb and 4-Kb SPI Serial CMOS EEPROM

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	CATALYST [Catalyst Semiconductor]

Direct Link	http://www.catalyst-semiconductor.com

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8 / 17 page

CAT25010, CAT25020, CAT25040

Doc. No. MD-1006 Rev. T

Characteristics subject to change without notice

Write Status Register

The Status Register is written by sending a WRSR

instruction according to timing shown in Figure 6. Only

bits 2 and 3 can be written using the WRSR

command.

Write Protection

When WP

¯¯¯ input is low all write operations to the

memory array and 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

¯¯¯ input timing is shown in Figure 7.

Figure 6. WRSR Timing

Note:

Dashed Line = mode (1, 1) - - - - - -

Figure 7. WP

¯¯¯ Timing

Note:

Dashed Line = mode (1, 1) - - - - - -

911

SCK

MSB

HIGH IMPEDANCE

DATA IN

OPCODE

SCK

t WPS

t WPH

CAT25010LET3 Datasheet(PDF) 8 Page - Catalyst Semiconductor