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参数资料
| 型号： | 24LC01 |
| 厂商： | Holtek Semiconductor Inc. |
| 英文描述： | 1K/2K 2-Wire CMOS Serial EEPROM |
| 中文描述： | 1K/2K 2线的CMOS串行EEPROM |
| 文件页数： | 4/8页 |
| 文件大小： | 248K |
| 代理商： | 24LC01 |
Functional Description
Serial clock (SCL)
The SCL input is used for positive edge clock
data into each EEPROM device and negative
edge clock data out of each device.
Serial data (SDA)
The SDA pin is bidirectional for serial data
transfer. The pin is open-drain driven and
may be wired-OR with any number of other
open-drain or open collector devices.
A0, A1, A2
The A2, A1 and A0 pins are device address
inputs that are hard wired for the
HT24LC01/02. As many as eight 1K/2K de-
vices may be addressed on a single bus system
(the device addressing is discussed in detail
under the Device Addressing section).
Write protect (WP)
The HT24LC01/02 has a write protect pin
that provides hardware data protection. The
write protect pin allows normal read/write
operations when connected to the VSS. When
the write protect pin is connected to Vcc, the
write protection feature is enabled and oper-
ates as shown in the following table.
WP Pin
Status
Protect Array
HT24LC01
HT24LC02
At VCC
Full Array (1K)
Full Array (2K)
At VSS
Normal Read/Write Operations
Memory organization
HT24LC01, 1K Serial EEPROM
Internally organized with 128 8-bit words, the
1K requires a 7-bit data word address for
random word addressing.
HT24LC02, 2K Serial EEPROM
Internally organized with 256 8-bit words, the
2K requires an 8-bit data word address for
random word addressing.
Device operations
Clock and data transition
Data transfer may be initiated only when the
bus is not busy. During data transfer, the data
line must remain stable whenever the clock
line is high. Changes in data line while the
clock line is high will be interpreted as a
START or STOP condition.
Start condition
A high-to-low transition of SDA with SCL high
is a start condition which must precede any
other command (refer to Start and Stop Defi-
nition Timing diagram).
Stop condition
A low-to-high transition of SDA with SCL high
is a stop condition. After a read sequence, the
stop command will place the EEPROM in a
standby power mode (refer to Start and Stop
Definition Timing Diagram).
Acknowledge
All addresses and data words are serially
transmitted to and from the EEPROM in 8-bit
words. The EEPROM sends a zero to acknow-
ledge that it has received each word. This
happens during the ninth clock cycle.
Device addressing
The 1K and 2K EEPROM devices all require an
8-bit device address word following a start con-
dition to enable the chip for a read or write
operation. The device address word consist of a
mandatory one, zero sequence for the first four
most significant bits (refer to the diagram show-
ing the Device Address). This is common to all
the EEPROM device.
The next three bits are the A2, A1 and A0 device
address bits for the 1K/2K EEPROM. These
three bits must compare to their corresponding
hard-wired input pins.
HT24LC01/02
4
6th May ’99
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 24LC014 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:1K I2C⑩ Serial EEPROM |
| 24LC014-E/MC | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:1K I2Ca?￠ Serial EEPROM |
| 24LC014-E/MNY | 功能描述:电可擦除可编程只读存储器 1K 128 X 8 SERIAL EE 2.5V EXT 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 |
| 24LC014-E/MS | 功能描述:电可擦除可编程只读存储器 1K 128 X 8 SERIAL EE 2.5V EXT 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 |
| 24LC014-E/P | 功能描述:电可擦除可编程只读存储器 1K 128 X 8 SERIAL EE 2.5V EXT 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 |
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