MBM29LV004TC データシートの表示（PDF） - Fujitsu

部品番号

コンポーネント説明

メーカー

MBM29LV004TC

4M (512K × 8) BIT

Fujitsu 

MBM29LV004TC-70/-90/-12/MBM29LV004BC-70/-90/-12

The manufacturer and device codes may also be read via the command register, for instances when the

MBM29LV004TC/BC are erased or programmed in a system without access to high voltage on the A9 pin. The

command sequence is illustrated in Table 6. (Refer to Autoselect Command section.)

Byte 0 (A0 = VIL) represents the manufacturer’s code (Fujitsu = 04H) and (A0 = VIH) represents the device identifier

code (MBM29LV004TC = B5H and MBM29LV004BC = B6H). These two bytes/words are given in the tables 3.1

and 3.2. All identifiers for manufactures and device will exhibit odd parity with DQ7 defined as the parity bit. In

order to read the proper device codes when executing the autoselect, A1 must be VIL. (See Tables 3.1 and 3.2.)

Table 3 .1 MBM29LV004TC/004BC Sector Protection Verify Autoselect Codes

Type

A13 to A18

A10

A6

A1

A0

Code (HEX)

Manufacture’s Code

X

VIL

VIL

VIL

VIL

04H

MBM29LV004TC

X

Device Code

MBM29LV004BC

X

VIL

VIL

VIL

VIH

VIL

VIL

VIL

VIH

B5H

B6H

Sector Protection

Sector

Addresses

VIL

VIL

VIH

VIL

01H*

* : Outputs 01H at protected sector addresses and outputs 00H at unprotected sector addresses.

Table 3 .2 Expanded Autoselect Code Table

Type

Code

DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0

Manufacture’s Code

04H

0

0

0

0

0

1

0

0

MBM29LV004TC B5H

1

0

1

1

0

1

0

1

Device Code

MBM29LV004BC B6H

1

0

1

1

0

1

1

0

Sector Protection

01H

0

0

0

0

0

0

0

1

11

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