LH28F008SCL-12 View Datasheet(PDF) - Sharp Electronics

Part Name

Description

Manufacturer

LH28F008SCL-12

Flash Memory 8M (1M ×8)

Sharp Electronics 

LHF08CH3

9

3.5 Read Identifier Codes Operation

The read identifier codes operation outputs the

manufacturer code, device code, block lock

configuration codes for each block, and the master

lock configuration code (see Figure 4). Using the

manufacturer and device codes, the system CPU can

automatically match the device with its proper

algorithms. The block lock and master lock

configuration codes identify locked and unlocked

blocks and master lock-bit setting.

FFFFF

FOO04

FOO03

FOO02

Reserved for

Future Implementation

Block 15 Lock Configuration Code

100021

10001

10000

OFFFF

Block 1 Lock Configuration Code

3.6 Write

Writing commands to the CUI enable reading 01

device data and identifier codes. They also control

inspection and clearing of the status register. When

VPP=VPPHli2/3~

the CUI additionally controls block

erasure, byte write, and lock-bit configuration.

The Block Erase command requires appropriate

command data and an address within the block to 5s

erased. The Byte Write command requires the

command and address of the location to be written.

Set Master and Block Lock-Bit commands require ths

command and address within the device (Master

Lock) or block within the device (Block Lock) to be

locked. The Clear Block Lock-Bits command requires

the command and address within the device.

The CUI does not occupy an addressable memory

location. It is written when WE# and CE# are active.

The address and data needed to execute a commanc

are latched on the rising edge of WE# or CE#

(whichever goes high first). Standard microprocessor

write timings are used. Figures 16 and 17 illustrate

WE# and CE#-controlled write operations.

4 COMMAND DEFINITIONS

When the V,, voltage 5 V,,,,, Read operations

from the status register, identifier codes, or blocks

are enabled. Placing V,,,,,,,

on V,, enables

successful block erase, byte write and lock-bii

configuration operations.

Device operations are selected by writing specific

commands into the CUI. Table 4 defines these

commands.

Master Lock Configuration Code

00002 t --------------B---lock 0 Lock Configuration Code

L------------------------------------

00001~

Device Code

Manufacturer Code Block (I

Figure 4. Device Identifier Code Memory Map

L

RPV I n

Share Link: