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11AA02UID 参数 Datasheet PDF下载

11AA02UID图片预览
型号: 11AA02UID
PDF下载: 下载PDF文件 查看货源
内容描述: [2K UNI/O® Serial EEPROM with Unique 32-Bit Serial Number]
分类和应用: 可编程只读存储器电动程控只读存储器电可擦编程只读存储器
文件页数/大小: 32 页 / 666 K
品牌: MICROCHIP [ MICROCHIP ]
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11AA02UID  
The Block Protection (BP0 and BP1) bits indicate  
which blocks are currently write-protected. These bits  
are set by the user through the WRSR instruction.  
These bits are nonvolatile.  
4.5  
Read Status Register (RDSR)  
Instruction  
The RDSRinstruction provides access to the STATUS  
register. The STATUS register may be read at any time,  
even during a write cycle. The STATUS register is  
formatted as follows:  
Note:  
If Read Status Register command is  
initiated while the 11AA02UID is currently  
executing an internal write cycle on the  
STATUS register, the new Block  
Protection bit values will be read during  
the entire command.  
7
6
5
4
3
2
1
0
X
X
X
X
BP1  
BP0  
WEL  
WIP  
Note: Bits 4-7 are don’t cares, and will read as ‘0’.  
The WIP and WEL bits will update dynamically (asyn-  
chronous to issuing the RDSR instruction). Further-  
more, after the STATUS register data is received, the  
master can provide a MAK during the Acknowledge  
sequence to request that the data be transmitted again.  
This allows the master to continuously monitor the WIP  
and WEL bits without the need to issue another full  
command.  
The Write-In-Process (WIP) bit indicates whether the  
11AA02UID is busy with a write operation. When set to  
a ‘1’, a write is in progress, when set to a ‘0’, no write  
is in progress. This bit is read-only.  
The Write Enable Latch (WEL) bit indicates the status  
of the write enable latch. When set to a ‘1’, the latch  
allows writes to the array, when set to a ‘0’, the latch  
prohibits writes to the array. This bit is set and cleared  
using the WREN and WRDI instructions, respectively.  
This bit is read-only for any other instruction.  
Once the master is finished, it provides a NoMAK to  
end the operation.  
Note:  
The current drawn for a Read Status  
Register command during a write cycle is  
a combination of the ICC Read and ICC  
Write operating currents.  
FIGURE 4-6:  
READ STATUS REGISTER COMMAND SEQUENCE  
Device Address  
Standby Pulse  
Start Header  
SCIO  
0 1 0 1 0 1 0 1  
1 0 1 0 0 0 0 0  
Command  
STATUS Register Data  
3 2 1 0  
SCIO  
0 0 0 0 0 1 0 1  
0 0 0 0  
Note: The STATUS register data can continuously be read, or polled, by transmitting a MAK in place of the NoMAK.  
2013 Microchip Technology Inc.  
DS20005206A-page 13