Datasheet > 29F04-12TI

29F04-12TI

更新时间： 2024-01-27 22:24:44

品牌	Logo	应用领域
华邦 - WINBOND		/
页数	文件大小	规格书
29页	196K
描述
Flash Memory

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技术参数
数据手册

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29F04-12TI 技术参数

生命周期：	Active	包装说明：	,
Reach Compliance Code：	compliant	风险等级：	5.8
Base Number Matches：	1

29F04-12TI 数据手册

BRIGHT

Microelectronics

Inc.

Preliminary BM29F040

Autoselect Mode

The Autoselect mode allows access to the manufacturers and the device code. This mode can be

enabled by either taking the address pin A9 to VID (11.5 to 12.5 volts) or by giving the Autoselect

Command sequence as shown in Table 5. Once the Autoselect mode is enabled two identifier bytes

can be read on the device outputs by toggling A0 from VIL to VIH. Byte 0 (A0 = VIL) represents the

manufacturers code (ADH for BMI). Byte 1 (A0 = VIH) represents the device identifier and this is 40H

for the BM29F040. A READ command must be written to the Command register to return to the Read

mode after the Autoselect mode.

Write Operations

The on-chip state machines control the Chip Erase, Sector Erase and byte Write operations. This

frees the system processor to do other tasks. All the Programming and Erase voltages are generated

internally. The Write and Erase timings and algorithms are also built into the device. The byte write/

sector erase or Chip Erase Command Interface provides additional data protection to avoid

accidental Write or Erase.

Commands are written to the Command register using standard microprocessor write timings. The

Command register recognizes Read mode, Autoselect mode, Chip Erase, Sector Erase (64K bytes

per sector) and Program commands. The Command register does not occupy an addressable

memory location. The interface register is a latch used to store the command and address and data

information needed to execute the command.

Command Definitions

Device operations are selected by writing specific address and data sequences into the Command

Read/ Reset Command

The read or reset operation is initiated by writing the read/reset command sequence to the command

reads until the command register contents are changed.

The device will automatically power-up in the read/reset mode. In this case, a command sequence is

not needed to read the memory data. This default power up to read mode ensures that no spurious

changes of the data can take place during power-up. As shown in this data sheet, the timing

parameters and A.C. read waveforms should be referenced.

A single cycle reset is also available as shown in table.

A Winbond Company

Publication Release Date: June 1999

Revision A1

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