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参数资料
| 型号： | 24AA65-P |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | 64K 1.8V I 2 C O Smart Serial O EEPROM |
| 中文描述： | 64K的1.8VI 2二氧化碳?串行EEPROM的智能 |
| 文件页数： | 11/12页 |
| 文件大小： | 105K |
| 代理商： | 24AA65-P |
24AA65
DS21056F-page 8
1996 Microchip Technology Inc.
byte would be 10XX0011. After the third byte is sent to
the device, it will acknowledge and a STOP bit is then
sent by the master to complete the command.
During a normal write sequence, if an attempt is made
to write to a protected address, no data will be written
and the device will not report an error or abort the com-
mand.
If a write command is attempted across a
secure boundary, unprotected addresses will be written
and protected addresses will not.
5.8
Security Conguration Read
The status of the secure portion of memory can be read
by using the same technique as programming this
option except the READ bit (bit 6) of the conguration
byte is set to a one. After the conguration byte is sent,
the device will acknowledge and then send two bytes of
data to the master just as in a normal read sequence.
The master must acknowledge the rst byte and not
acknowledge the second, and then send a stop bit to
end the sequence. The upper four bits of both of these
bytes will always be read as'1's. The lower four bits of
the rst byte contains the starting secure block. The
lower four bits of the second byte contains the number
of secure blocks. The default starting secure block is f-
teen and the default number of secure blocks is zero
6.0
ACKNOWLEDGE POLLING
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (this feature can be used to maximize bus
throughput). Once the stop condition for a write com-
mand has been issued from the master, the device ini-
tiates the internally timed write cycle. ACK polling can
be initiated immediately. This involves the master send-
ing a start condition followed by the control byte for a
write command (R/W = 0). If the device is still busy with
the write cycle, then no ACK will be returned. If the
cycle is complete, then the device will return the ACK
and the master can then proceed with the next read or
write command. See Figure 6-1 for ow diagram.
FIGURE 6-1:
ACKNOWLEDGE POLLING
FLOW
Send
Write Command
Send Stop
Condition to
Initiate Write Cycle
Send Start
Send Control Byte
with R/W = 0
Did Device
Acknowledge
(ACK = 0)?
Next
Operation
No
Yes
相关PDF资料 |
PDF描述 |
|---|---|
| 24AA65-SM | 64K 1.8V I 2 C O Smart Serial O EEPROM |
| 24C040-IP | 4K SPI ⑩ Bus Serial EEPROM |
| 24C040-ISN | 4K SPI ⑩ Bus Serial EEPROM |
| 24C040-IST | 4K SPI ⑩ Bus Serial EEPROM |
| 24C040-P | 4K SPI ⑩ Bus Serial EEPROM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 24AA65SM | 制造商:MIC 功能描述:MICROCHIP 2000 S1I2A 制造商:MICHIP 功能描述: |
| 24AA65T/SM | 功能描述:电可擦除可编程只读存储器 8kx8 - 1.8V Smart RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| 24AA65T/SMG | 功能描述:电可擦除可编程只读存储器 256x8 - 1.8V Smart Lead Free Package RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| 24ABGNA3.15 | 功能描述:保险丝 24KV 3.15A RoHS:否 制造商:Littelfuse 产品:Surface Mount Fuses 电流额定值:0.5 A 电压额定值:600 V 保险丝类型:Fast Acting 保险丝大小/组:Nano 尺寸:12.1 mm L x 4.5 mm W 安装风格: 端接类型:SMD/SMT 系列:485 |
| 24ABGNA3-15 | 制造商:Cooper Bussmann 功能描述:HV,AIR,UK,24KV,3.15A - Bulk |
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