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参数资料
| 型号： | SST25VF020B-80-4I-SAE-T |
| 厂商： | Microchip Technology |
| 文件页数： | 6/35页 |
| 文件大小： | 0K |
| 描述： | IC FLASH SER 2MB 80MHZ SPI 8SOIC |
| 标准包装： | 3,300 |
| 系列： | SST25 |
| 格式 - 存储器： | 闪存 |
| 存储器类型： | FLASH |
| 存储容量： | 2M (256K x 8) |
| 速度： | 80MHz |
| 接口： | SPI 串行 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
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2 Mbit SPI Serial Flash
A Microchip Technology Company
SST25VF020B
Data Sheet
Hold Operation
The HOLD# pin is used to pause a serial sequence underway with the SPI flash memory without reset-
ting the clocking sequence. To activate the HOLD# mode, CE# must be in active low state. The HOLD#
mode begins when the SCK active low state coincides with the falling edge of the HOLD# signal. The
HOLD mode ends when the HOLD# signal’s rising edge coincides with the SCK active low state.
If the falling edge of the HOLD# signal does not coincide with the SCK active low state, then the device
enters Hold mode when the SCK next reaches the active low state. Similarly, if the rising edge of the
HOLD# signal does not coincide with the SCK active low state, then the device exits in Hold mode
when the SCK next reaches the active low state. See Figure 4 for Hold Condition waveform.
Once the device enters Hold mode, SO will be in high-impedance state while SI and SCK can be V IL or
V IH.
If CE# is driven high during a Hold condition, the device returns to Standby mode. As long as HOLD#
signal is low, the memory remains in the Hold condition. To resume communication with the device,
HOLD# must be driven active high, and CE# must be driven active low. See Figure 4 for Hold timing.
SCK
HOLD#
Active
Hold
Active
Hold
Active
1417 HoldCond.0
Figure 4: Hold Condition Waveform
Write Protection
SST25VF020B provides software Write protection. The Write Protect pin (WP#) enables or disables
the lock-down function of the status register. The Block-Protection bits (BP1, BP0, and BPL) in the sta-
tus register, and the Top/Bottom Sector Protection Status bits (TSP and BSP) in Status Register 1, pro-
vide Write protection to the memory array and the status register. See Table 5 for the Block-Protection
description.
Write Protect Pin (WP#)
The Write Protect (WP#) pin enables the lock-down function of the BPL bit (bit 7) in the status register.
When WP# is driven low, the execution of the Write-Status-Register (WRSR) instruction is determined
by the value of the BPL bit (see Table 2). When WP# is high, the lock-down function of the BPL bit is
disabled.
Table 2: Conditions to execute Write-Status-Register (WRSR) Instruction
WP#
L
L
H
BPL
1
0
X
Execute WRSR Instruction
Not Allowed
Allowed
Allowed
T2.0 25054
?2012 Silicon Storage Technology, Inc.
6
DS25054A
01/12
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相关代理商/技术参数 |
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| SST25VF032B | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:32 Mbit SPI Serial Flash |
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| SST25VF032B-50-4C-QAF | 功能描述:闪存 32Mbit 50MHz 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 |
| SST25VF032B-50-4C-S2AF | 功能描述:闪存 32Mbit 50MHz 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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