HN58X25128I View Datasheet(PDF) - Renesas Electronics

Part Name

Description

View to exact match

HN58X25128I

Serial Peripheral Interface 128k EEPROM (16-kword × 8-bit) 256k EEPROM (32-kword × 8-bit) Electrically Erasable and Programmable Read Only Memory

Renesas Electronics 

HN58X25128I/HN58X25256I

Instruction Set

Instruction

WREN

WRDI

RDSR

WRSR

READ

WRITE

Description

Write Enable

Write Disable

Read Status Register

Write Status Register

Read from Memory Array

Write to Memory Array

Instruction Format

0000 0110

0000 0100

0000 0101

0000 0001

0000 0011

0000 0010

Write Enable (WREN):

The Write Enable Latch (WEL) bit must be set prior to each WRITE and WRSR instruction. The only way to

do this is to send a Write Enable instruction to the device. As shown in the following figure, to send this

instruction to the device, chip select (S) is driven low, and the bits of the instruction byte are shifted in, on

serial data input (D). The device then enters a wait state. It waits for the device to be deselected, by chip

select (S) being driven high.

Write Enable (WREN) Sequence

VIH

5

VIL

9

VIH

VIL

VIH

C

VIL

VIH

D

VIL

Q

0 123 456 7

Instruction

High-Z

Rev.1.00, Jun.20.2003, page 14 of 27

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