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参数资料
型号： M29W400BT70M6T
厂商： NUMONYX
元件分类： PROM
英文描述： 256K X 16 FLASH 2.7V PROM, 70 ns, PDSO44
封装： 0.525 INCH, PLASTIC, SOP-44
文件页数： 23/26页
文件大小： 313K
代理商： M29W400BT70M6T
M29W400BT, M29W400BB
6/25
BUS OPERATIONS
There are five standard bus operations that control
the device. These are Bus Read, Bus Write, Out-
Put Disable, Standby and Automatic Standby. See
Tables 5 and 6, Bus Operations, for a summary.
Typically glitches of less than 5ns on Chip Enable
or Write Enable are ignored by the memory and do
not affect bus operations.
Bus Read. Bus Read operations read from the
memory cells, or specific registers in the Com-
mand Interface. A valid Bus Read operation in-
volves setting the desired address on the Address
Inputs, applying a Low signal, VIL, to Chip Enable
and Output Enable and keeping Write Enable
High, VIH. The Data Inputs/Outputs will output the
value, see Figure 9, Read Mode AC Waveforms,
and Table 14, Read AC Characteristics, for details
of when the output becomes valid.
Bus Write. Bus Write operations write to the
Command Interface. A valid Bus Write operation
begins by setting the desired address on the Ad-
dress Inputs. The Address Inputs are latched by
the Command Interface on the falling edge of Chip
Enable or Write Enable, whichever occurs last.
The Data Inputs/Outputs are latched by the Com-
mand Interface on the rising edge of Chip Enable
or Write Enable, whichever occurs first. Output En-
able must remain High, VIH, during the whole Bus
Write operation. See Figures 10 and 11, Write AC
Waveforms, and Tables 15 and 16, Write AC
Characteristics, for details of the timing require-
ments.
Output Disable. The Data Inputs/Outputs are in
the high impedance state when Output Enable is
High, VIH.
Standby. When Chip Enable is High, VIH,the
memory enters Standby mode and the Data In-
puts/Outputs pins are placed in the high-imped-
ance state. To reduce the Supply Current to the
Standby Supply Current, ICC2, Chip Enable should
be held within VCC ± 0.2V. For the Standby current
level see Table 13, DC Characteristics.
During program or erase operations the memory
will continue to use the Program/Erase Supply
Current, ICC3, for Program or Erase operations un-
til the operation completes.
Table 5. Bus Operations, BYTE =VIL
Note: X = VIL or VIH.
Table 6. Bus Operations, BYTE =VIH
Note: X = VIL or VIH.
Operation
E
G
W
Address Inputs
DQ15A–1, A0-A17
Data Inputs/Outputs
DQ14-DQ8
DQ7-DQ0
Bus Read
VIL
VIH
Cell Address
Hi-Z
Data Output
Bus Write
VIL
VIH
VIL
Command Address
Hi-Z
Data Input
Output Disable
X
VIH
X
Hi-Z
Standby
VIH
X
Hi-Z
Read Manufacturer
Code
VIL
VIH
A0 = VIL,A1 = VIL,A9=VID,
Others VIL or VIH
Hi-Z
20h
Read Device Code
VIL
VIH
A0=VIH, A1=VIL,A9=VID,
Others VIL or VIH
Hi-Z
EEh (M29W400BT)
EFh (M29W400BB)
Operation
E
G
W
Address Inputs
A0-A17
Data Inputs/Outputs
DQ15A–1, DQ14-DQ0
Bus Read
VIL
VIH
Cell Address
Data Output
Bus Write
VIL
VIH
VIL
Command Address
Data Input
Output Disable
X
VIH
X
Hi-Z
Standby
VIH
X
Hi-Z
Read Manufacturer
Code
VIL
VIH
A0 = VIL,A1 = VIL,A9=VID,
Others VIL or VIH
0020h
Read Device Code
VIL
VIH
A0=VIH, A1=VIL,A9=VID,
Others VIL or VIH
00EEh (M29W400BT)
00EFh (M29W400BB)
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相关代理商/技术参数
参数描述
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M29W400BT70N6 功能描述:闪存 512Kx8 or 256Kx16 70 RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel
M29W400BT90M1 功能描述:闪存 512Kx8 or 256Kx16 90 RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel
M29W400BT90M1T 功能描述:闪存 512Kx8 or 256Kx16 90 RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel
M29W400BT90N1 功能描述:闪存 512Kx8 or 256Kx16 90 RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel
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