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參數(shù)資料
| 型號： | AT25010A |
| 廠商： | Atmel Corp. |
| 英文描述： | SPI Serial Extended TEMPERATURE EEPROMS 1K 2K 4K |
| 中文描述： | SPI串行擴展溫度4K的EEPROM的一千2K |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 392K |
| 代理商： | AT25010A |
7
AT25010A/020A/040A
5087B–SEEPR–1/05
Functional
Description
The AT25010A/020A/040A is designed to interface directly with the synchronous serial
peripheral interface (SPI) of the 6805 and 68HC11 series of microcontrollers.
The AT25010A/020A/040A utilizes an 8-bit instruction register. The list of instructions
and their operation codes are contained in Table 5. All instructions, addresses, and data
are transferred with the MSB first and start with a high-to-low CS transition.
Note:
“A” represents MSB address bit A8.
WRITE ENABLE (WREN):
The device will power up in the write disable state when V
CC
is applied. All programming instructions must therefore be preceded by a Write Enable
instruction. The WP pin must be held high during a WREN instruction.
WRITE DISABLE (WRDI):
To protect the device against inadvertent writes, the Write
Disable instruction disables all programming modes. The WRDI instruction is indepen-
dent of the status of the WP pin.
READ STATUS REGISTER (RDSR):
The Read Status Register instruction provides
access to the status register. The READY/BUSY and Write Enable status of the device
can be determined by the RDSR instruction. Similarly, the block write protection bits
indicate the extent of protection employed. These bits are set by using the WRSR
instruction.
WRITE STATUS REGISTER (WRSR):
The WRSR instruction allows the user to select
one of four levels of protection. The AT25010A/020A/040A is divided into four array seg-
ments. One-quarter, one-half, or all of the memory segments can be protected. Any of
Table 5.
Instruction Set for the AT25010A/020A/040A
Instruction Name
Instruction Format
Operation
WREN
0000 X110
Set Write Enable Latch
WRDI
0000 X100
Reset Write Enable Latch
RDSR
0000 X101
Read Status Register
WRSR
0000 X001
Write Status Register
READ
0000 A011
Read Data from Memory Array
WRITE
0000 A010
Write Data to Memory Array
Table 6.
Status Register Format
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
X
X
BP1
BP0
WEN
RDY
Table 7.
Read Status Register Bit Definition
Bit
Definition
Bit 0 (RDY)
Bit 0 = “0” (RDY) indicates the device is ready. Bit 0 = “1” indicates the write
cycle is in progress.
Bit 1 (WEN)
Bit 1= “0” indicates the device is not write-enabled. Bit 1 = “1” indicates the
device is write-enabled.
Bit 2 (BP0)
See Table 8 on page 8.
Bit
3
(BP1)
See Table 8 on page 8.
Bits 4
6 are “0”s when device is not in an internal write cycle.
Bits 0
7 are “1”s during an internal write cycle.
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相關代理商/技術參數(shù) |
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| AT25010A_06 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:SPI Serial EEPROM |
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| AT25010A-10PI-1.8 | 功能描述:IC EEPROM 1KBIT 20MHZ 8DIP RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標準包裝:96 系列:- 格式 - 存儲器:閃存 存儲器類型:FLASH 存儲容量:16M（2M x 8，1M x 16） 速度:70ns 接口:并聯(lián) 電源電壓:2.65 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 封裝/外殼:48-TFSOP（0.724"，18.40mm 寬） 供應商設備封裝:48-TSOP 包裝:托盤 |
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