LH28F800BJB-PTTL90 Ver la hoja de datos (PDF) - Sharp Electronics

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Fabricante

LH28F800BJB-PTTL90

8M (x8/x16) Flash Memory

Sharp Electronics 

LHF80J21

9

3.5 Read Identifier Codes

The read identifier codes operation outputs the

manufacturer code, device code, block lock configuration

codes for each block and the permanent 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 permanent

lock configuration codes identify locked and unlocked

blocks and permanent lock-bit setting.

[A18-A0]

Top Boot

[A18-A-1]

7FFFF

7F003

7F002

7F001

7F000

7EFFF

7E003

7E002

7E001

7E000

7DFFF

7D003

7D002

7D001

7D000

7CFFF

79000

Reserved for Future Implementation

FFFFF

Boot Block 0 Lock Configuration Code

FE006

FE005

FE004

Reserved for Future Implementation

FE003

Boot Block 0 FE000

Reserved for Future Implementation

FDFFF

Boot Block 1 Lock Configuration Code

FC006

FC005

FC004

Reserved for Future Implementation

FC003

Boot Block 1 FC000

Reserved for Future Implementation

FBFFF

Parameter Block 0 Lock Configuration Code

Reserved for Future Implementation

Parameter Block 0

FA006

FA005

FA004

FA003

FA000

(Parameter Blocks 1 through 4)

F9FFF

F2000

78FFF

78003

78002

78001

78000

77FFF

70003

70002

70001

70000

6FFFF

08000

Reserved for Future Implementation

F1FFF

F0006

Parameter Block 5 Lock Configuration Code

F0005

F0004

Reserved for Future Implementation

F0003

Parameter Block 5 F0000

Reserved for Future Implementation

EFFFF

E0006

Main Block 0 Lock Configuration Code

E0005

E0004

Reserved for Future Implementation

E0003

Main Block 0 E0000

(Main Blocks 1 through 13)

DFFFF

10000

07FFF

01000

Reserved for Future Implementation

0FFFF

02000

00FFF

00080

OTP Block

01FFF

00100

0007F

00004

00003

00002

00001

00000

Reserved for Future Implementation

Permanent Lock Configuration Code

Main Block 14 Lock Configuration Code

Device Code

Manufacturer Code Main Block 14

000FF

00008

00007

00006

00005

00004

00003

00002

00001

00000

Figure 4. Device Identifier Code Memory Map

3.6 OTP(One Time Program) Block

The OTP block is a special block that can not be erased.

The block is divided into two parts. One is a factory

program area where a unique number can be written

according to customer requirements in SHARP factory.

This factory program area is "READ ONLY" (Already

locked). The other is a customer program area that can be

used by customers. This customer program area can be

locked. After locking, this customer program area is

protected permanently.

The OTP block is read in Configuration Read Mode by

writing Read Identifier Codes command(90H). To return

to Read Array Mode, write Read Array command(FFH).

The OTP block is programmed by writing OTP Program

command(C0H). First write OTP Program command and

then write data with address to the device (See Figure 5).

If OTP program is failed, SR.4(WORD/BYTE WRITE

AND SET LOCK-BIT STATUS) bit is set to "1". And if

this OTP block is locked, SR.1(DEVICE PROTECT

STATUS) bit is set to "1" too.

The OTP block is also locked by writing OTP Program

command(C0H). First write OTP Program command and

then write data "FFFDH" with address "80H" to the

device. Address "80H" of OTP block is OTP lock

information. Bit 0 of address "80H" means factory

program area lock status("1" is "NOT LOCKED", "0" is

"LOCKED"). Bit 1 of address "80H" means customer

program area lock status. The OTP lock information can

not be cleared, after once it is set.

[A18-A0]

00FFF

Customer Program Area

[A18-A-1]

01FFF

00085

00084

00081

00080

Factory Program Area

OTP Lock

Customer Program Area Lock(Bit 1)

Factory Program Area Lock(Bit 0)

0010A

00109

00102

00100

Figure 5. OTP Block Address Map

Rev. 1.27

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