参数资料
型号: 24C02CP
英文描述: I2C Serial EEPROM
中文描述: I2C串行EEPROM的
文件页数: 6/12页
文件大?。?/td> 174K
代理商: 24C02CP
24C02C
DS21202C-page 6
1999 Microchip Technology Inc.
5.0
DEVICE ADDRESSING
A control byte is the first byte received following the
start condition from the master device (Figure 5-1). The
control byte consists of a four bit control code; for the
24C02C this is set as 1010 binary for read and write
operations. The next three bits of the control byte are
the chip select bits (A2, A1, A0). The chip select bits
allow the use of up to eight 24C02C devices on the
same bus and are used to select which device is
accessed. The chip select bits in the control byte must
correspond to the logic levels on the corresponding A2,
A1, and A0 pins for the device to respond. These bits
are in effect the three most significant bits of the word
address.
The last bit of the control byte defines the operation to
be performed. When set to a one a read operation is
selected, and when set to a zero a write operation is
selected. Following the start condition, the 24C02C
monitors the SDA bus checking the control byte being
transmitted. Upon receiving a 1010 code and appropri-
ate chip select bits, the slave device outputs an
acknowledge signal on the SDA line. Depending on the
state of the R/W bit, the 24C02C will select a read or
write operation.
FIGURE 5-1:
CONTROL BYTE FORMAT
5.1
Contiguous Addressing Across
Multiple Devices
The chip select bits A2, A1, A0 can be used to expand
the contiguous address space for up to 16K bits by add-
ing up to eight 24C02C devices on the same bus. In this
case, software can use A0 of the control byte as
address bit A8, A1 as address bit A9, and A2 as
address bit A10. It is not possible to write or read
across device boundaries.
1
0
1
0
A2
A1
A0
S
ACK
R/W
Control Code
Chip Select
Bits
Slave Address
Acknowledge Bit
Start Bit
Read/Write Bit
This Material Copyrighted by Its Respective Manufacturer
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相关代理商/技术参数
参数描述
24C02C-P 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2K 5.0V I 2 C ⑩ Serial EEPROM
24C02CSN 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM
24C02C-SN 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2K 5.0V I 2 C ⑩ Serial EEPROM
24C02CST 制造商:未知厂家 制造商全称:未知厂家 功能描述:I2C Serial EEPROM
24C02C-ST 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2K 5.0V I 2 C ⑩ Serial EEPROM
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