參數(shù)資料
型號： 24AA512
廠商： Microchip Technology Inc.
英文描述： 512K I2C CMOS Serial EEPROM
中文描述： 為512k的I2C的CMOS串行EEPROM
文件頁數(shù)： 12/26頁
文件大小： 420K
代理商： 24AA512
24AA512/24LC512/24FC512
DS21754E-page 12
2004 Microchip Technology Inc.
8.0
READ OPERATION
Read operations are initiated in the same way as write
operations with the exception that the R/W bit of the
control byte is set to ‘
1
’. There are three basic types of
read operations: current address read, random read
and sequential read.
8.1
Current Address Read
The 24XX512 contains an address counter that main-
tains the address of the last word accessed, internally
incremented by ‘
1
’. Therefore, if the previous read
access was to address n (n is any legal address), the
next current address read operation would access data
from address n + 1.
Upon receipt of the control byte with R/W bit set to ‘
1
’,
the 24XX512 issues an acknowledge and transmits the
8-bit data word. The master will not acknowledge the
transfer but does generate a Stop condition and the
24XX512 discontinues transmission (Figure 8-1).
FIGURE 8-1:
CURRENT ADDRESS
READ
8.2
Random Read
Random read operations allow the master to access
any memory location in a random manner. To perform
this type of read operation, first the word address must
be set. This is done by sending the word address to the
24XX512 as part of a write operation (R/W bit set to
‘
0
’). After the word address is sent, the master
generates a Start condition following the acknowledge.
This terminates the write operation, but not before the
internal address pointer is set. Then, the master issues
the control byte again but with the R/W bit set to a one.
The 24XX512 will then issue an acknowledge and
transmit the 8-bit data word. The master will not
acknowledge the transfer but does generate a Stop
condition which causes the 24XX512 to discontinue
transmission (Figure 8-2). After a random Read
command, the internal address counter will point to the
address location following the one that was just read.
8.3
Sequential Read
Sequential reads are initiated in the same way as a
random read except that after the 24XX512 transmits
the first data byte, the master issues an acknowledge
as opposed to the Stop condition used in a random
read. This acknowledge directs the 24XX512 to
transmit the next sequentially addressed 8-bit word
(Figure 8-3). Following the final byte transmitted to the
master, the master will NOT generate an acknowledge,
but will generate a Stop condition. To provide
sequential reads, the 24XX512 contains an internal
address pointer which is incremented by one at the
completion of each operation. This address pointer
allows the entire memory contents to be serially read
during one operation. The internal address pointer will
automatically roll over from address FFFF to address
0000 if the master acknowledges the byte received
from the array address FFFF.
FIGURE 8-2:
RANDOM READ
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
P
S
S
T
O
P
CONTROL
BYTE
S
T
A
R
T
DATA
BYTE
A
C
K
N
O
A
C
K
1
1
0
02 1 0
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
A
C
K
N
O
A
C
K
A
C
K
A
C
K
A
C
K
S
T
O
P
S
T
A
R
T
S 1 0 1 02 1 0
CONTROL
BYTE
ADDRESS
HIGH BYTE
ADDRESS
LOW BYTE
CONTROL
BYTE
DATA
BYTE
S
T
A
R
T
S 1 0 1 02 1 0
X = Don’t Care Bit
P
相關(guān)PDF資料
PDF描述
24LC512 512K I2C CMOS Serial EEPROM
24FC515 512K I2C CMOS Serial EEPROM
24AA515 512K I2C CMOS Serial EEPROM
24LC515 512K I2C CMOS Serial EEPROM
24FC65-IP 64K 5.0V 1 MHz I 2 C Smart Serial EEPROM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
24AA512/S16K 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE,DIE - Gel-pak, waffle pack, wafer, diced wafer on film
24AA512/W16K 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE,WAFER - Gel-pak, waffle pack, wafer, diced wafer on film
24AA512/WF16K 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE,WAF - Gel-pak, waffle pack, wafer, diced wafer on film
24AA512-I/MF 功能描述:電可擦除可編程只讀存儲器 64kx8 - 1.8V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
24AA512-I/MS 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE, IND - Rail/Tube 制造商:Microchip Technology Inc 功能描述:IC EEPROM 512KBIT 400KHZ 8MSOP 制造商:Microchip Technology Inc 功能描述:512K, 64K X 8, 1.8V SER EE, IND, 8 MSOP 3x3mm TUBE
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*