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參數(shù)資料
| 型號： | 24AA02 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 2K 1.8V CMOS serial EEPROMs(2K位，1M次擦寫周期，硬件寫保護，施密特觸發(fā)輸入，EEPROM) |
| 中文描述： | 2K 1.8V的CMOS串行EEPROM（2K位，100萬次擦寫周期，硬件寫保護，施密特觸發(fā)輸入和EEPROM） |
| 文件頁數(shù)： | 8/10頁 |
| 文件大小： | 113K |
| 代理商： | 24AA02 |
24AA01/02
DS21052E-page 8
1995 Microchip Technology Inc.
8.3
Sequential Read
Sequential reads are initiated in the same way as a ran-
dom read except that after the 24AA01/02 transmits
the first data byte, the master issues an acknowledge
as opposed to a stop condition in a random read. This
directs the 24AA01/02 to transmit the next sequentially
addressed 8 bit word (see Figure 9-1).
To provide sequential reads the 24AA01/02 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.
8.4
Noise Protection
The 24AA01/02 employs a V
CC
threshold detector cir-
cuit which disables the internal erase/write logic if the
V
CC
is below 1.5 volts at nominal conditions.
The SCL and SDA inputs have Schmitt trigger and filter
circuits which suppress noise spikes to assure proper
device operation even on a noisy bus.
9.0
PIN DESCRIPTIONS
9.1
SDA Serial Address/Data Input/Output
This is a bidirectional pin used to transfer addresses
and data into and data out of the device. It is an open
drain terminal, therefore the SDA bus requires a pullup
resistor to V
CC
(typical 10K
for 100 kHz, 1K for 400
kHz).
For normal data transfer SDA is allowed to change only
during SCL low. Changes during SCL high are
reserved for indicating the START and STOP condi-
tions.
9.2
SCL Serial Clock
This input is used to synchronize the data transfer from
and to the device.
9.3
WP
This pin must be connected to either V
SS
or V
CC
.
If tied to V
SS
, normal memory operation is enabled
(read/write the entire memory).
If tied to V
CC
, WRITE operations are inhibited. The
entire memory will be write-protected. Read opera-
tions are not affected.
This feature allows the user to use the 24AA01/02 as a
serial ROM when WP is enabled (tied to V
CC
).
9.4
A0, A1, A2
These pins are not used by the 24AA01/02. They may
be left floating or tied to either V
SS
or V
CC
.
FIGURE 9-1:
SEQUENTIAL READ
S
T
O
P
SDA LINE
DATA n
DATA n + 1
BUS ACTIVITY:
MASTER
BUS ACTIVITY:
A
C
K
A
C
K
A
C
K
DATA n + 2
A
C
K
P
DATA n + X
CONTROL
BYTE
N
O
A
C
K
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 24AA02/P | 功能描述:電可擦除可編程只讀存儲器 256x8 - 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24AA02-/P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| 24AA02-/SM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| 24AA02/SN | 功能描述:電可擦除可編程只讀存儲器 256x8 - 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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 24AA02-/SN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
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