MBM29DL800BA-70PFTR データシートの表示（PDF） - Fujitsu

部品番号

コンポーネント説明

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MBM29DL800BA-70PFTR

FLASH MEMORY CMOS 8M (1M × 8/512K × 16) BIT

Fujitsu 

MBM29DL800TA-70/-90/-12/MBM29DL800BA-70/-90/-12

Automatic Sleep Mode

There is a function called automatic sleep mode to restrain power consumption during read-out of

MBM29DL800TA/BA data. This mode can be used effectively with an application requested low power

consumption such as handy terminals.

To activate this mode, MBM29DL800TA/BA automatically switch themselves to low power mode when

MBM29DL800TA/BA addresses remain stably during access fine of 300 ns. It is not necessary to control CE,

WE, and OE on the mode. Under the mode, the current consumed is typically 1 µA (CMOS Level).

During simultaneous operation, VCC active current (ICC2) is required.

Since the data are latched during this mode, the data are read-out continuously. If the addresses are changed,

the mode is canceled automatically and MBM29DL800TA/BA read-out the data for changed addresses.

Output Disable

With the OE input at a logic high level (VIH), output from the devices are disabled. This will cause the output pins

to be in a high impedance state.

Autoselect

The autoselect mode allows the reading out of a binary code from the devices and will identify its manufacturer

and type. This mode is intended for use by programming equipment for the purpose of automatically matching

the devices to be programmed with its corresponding programming algorithm. This mode is functional over the

entire temperature range of the devices.

To activate this mode, the programming equipment must force VID (11.5 V to 12.5 V) on address pin A9. Two

identifier bytes may then be sequenced from the devices outputs by toggling address A0 from VIL to VIH. All

addresses are DON’T CARES except A0, A1, and A6 (A-1). (See Tables 2 and 3.)

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

MBM29DL800TA/BA are erased or programmed in a system without access to high voltage on the A9 pin. The

command sequence is illustrated in Table 8. (Refer to Autoselect Command section.)

Word 0 (A0 = VIL) represents the manufacturer’s code (Fujitsu = 04H) and word 1 (A0 = VIH) represents the device

identifier code (MBM29DL800TA = 4AH and MBM29DL800BA = CBH for ×8 mode; MBM29DL800TA = 224AH

and MBM29DL800BA = 22CBH for ×16 mode). These two bytes/words are given in the tables 5.1 and 5.2. 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 5.1 and 5.2.)

In case of applying VID on A9, since both Bank 1 and Bank 2 enters Autoselect mode, the simultenous operation

can not be executed.

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