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24LCS21A
FIGURE 7-2:
RANDOM READ
Bus Activity
Master
S
T
A
R
T
Control
Byte
Word
Address
S
T
A
R
T
Control
Byte
Data n
S
T
O
P
SDA Line
S 1 0 1 0 0 0 0 0
S 1 0 1 0 0 0 0 1
P
Bus Activity
A
C
K
A
C
K
A
C
K
N
O
A
C
K
FIGURE 7-3:
SEQUENTIAL READ
Bus Activity
Master
Control
Byte
Data n
Data n+1
Data n+2
Data n+X
S
T
O
P
SDA Line
P
Bus Activity
A
C
K
A
C
K
A
C
K
A
C
K
N
O
A
C
K
7.3
Sequential Read
7.4
Noise Protection
Sequential reads are initiated in the same way as a
random read except that after the 24LCS21A transmits
the first data byte, the master issues an acknowledge
as opposed to a Stop condition in a random read. This
directs the 24LCS21A to transmit the next sequentially
addressed 8-bit word (Figure 7-3).
To provide sequential reads the 24LCS21A 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.
? 2007 Microchip Technology Inc.
The 24LCS21A employs a V CC threshold detector
circuit which disables the internal erase/write logic if the
V CC is below 1.5 volts at nominal conditions.
The SDA, SCL and VCLK inputs have Schmitt Trigger
and filter circuits which suppress noise spikes to assure
proper device operation even on a noisy bus.
DS21161H-page 13
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相关代理商/技术参数
24LCS21A/S
制造商:Microchip Technology Inc 功能描述:1K 2.5V DUAL MODE SERIAL EEPRO - Gel-pak, waffle pack, wafer, diced wafer on film
24LCS21A/SN
功能描述:电可擦除可编程只读存储器 2.5V Dual Mode 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
24LCS21A/W
制造商:Microchip Technology Inc 功能描述:1K 2.5V DUAL MODE SERIAL EEPROM WAFER - Gel-pak, waffle pack, wafer, diced wafer on film
24LCS21A/WF
制造商:Microchip Technology Inc 功能描述:1K 2.5V DUAL MODE SERIAL EEPRO - Gel-pak, waffle pack, wafer, diced wafer on film
24LCS21A-I/P
功能描述:电可擦除可编程只读存储器 2.5V Dual Mode 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
24LCS21A-I/PG
功能描述:电可擦除可编程只读存储器 2.5V Dual Mode 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
24LCS21A-I/SN
功能描述:电可擦除可编程只读存储器 2.5V Dual Mode 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
24LCS21A-I/SNG
功能描述:电可擦除可编程只读存储器 2.5V Dual Mode 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