参数资料
型号: SST25VF020-20-4I-SAE-T
厂商: Microchip Technology
文件页数: 8/27页
文件大小: 0K
描述: IC FLASH SER 2MB 20MHZ 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: 20MHz
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)
2 Mbit SPI Serial Flash
A Microchip Technology Company
SST25VF020
Not Recommended for New Designs
Block Protection (BP1, BP0)
The Block-Protection (BP1, BP0) bits define the size of the memory area, as defined in Table 4, to be
software protected against any memory Write (Program or Erase) operations. The Write-Status-Regis-
ter (WRSR) instruction is used to program the BP1 and BP0 bits as long as WP# is high or the Block-
Protect-Lock (BPL) bit is 0. Chip-Erase can only be executed if Block-Protection bits are both 0. After
power-up, BP1 and BP0 are set to 1.
Block Protection Lock-Down (BPL)
WP# pin driven low (V IL ), enables the Block-Protection-Lock-Down (BPL) bit. When BPL is set to 1, it
prevents any further alteration of the BPL, BP1, and BP0 bits. When the WP# pin is driven high (V IH ),
the BPL bit has no effect and its value is “Don’t Care”. After power-up, the BPL bit is reset to 0.
Table 4: Software Status Register Block Protection 1
Status
Register
Bit
Protected Memory Area
Protection Level
0
1 (1/4 Memory Array)
2 (1/2 Memory Array)
3 (Full Memory Array)
BP1
0
0
1
1
BP0
0
1
0
1
2 Mbit
None
030000H-03FFFFH
020000H-03FFFFH
000000H-03FFFFH
T4.0 25078
1. Default at power-up for BP1 and BP0 is ‘11’.
Auto Address Increment (AAI)
The Auto Address Increment Programming-Status bit provides status on whether the device is in AAI
programming mode or Byte-Program mode. The default at power up is Byte-Program mode.
?2011 Silicon Storage Technology, Inc.
8
DS25078A
11/11
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