参数资料
| 型号： | 24LC512-I/P |
| 厂商： | Microchip Technology |
| 文件页数： | 9/36页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 512KBIT 400KHZ 8DIP |
| 产品培训模块： | I2C Serial EEPROM |
| 标准包装： | 60 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 512K (64K x 8) |
| 速度： | 400kHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
| 产品目录页面： | 1447 (CN2011-ZH PDF) |
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24AA512/24LC512/24FC512
5.0
DEVICE ADDRESSING
FIGURE 5-1:
CONTROL BYTE FORMAT
A control byte is the first byte received following the
Start condition from the master device (Figure 5-1).
Read/Write Bit
The control byte consists of a 4-bit control code; for the
24XX512 this is set as ‘ 1010 ’ binary for read and write
operations. The next three bits of the control byte are
Control Code
Chip Select
Bits
the Chip Select bits (A2, A1 and A0). The Chip Select
bits allow the use of up to eight 24XX512 devices on
S
1
0
1
0
A2
A1
A0 R/W ACK
the same bus and are used to select which device is
accessed. The Chip Select bits in the control byte must
Slave Address
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.
Start Bit
5.1
Acknowledge Bit
Contiguous Addressing Across
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. The next two bytes received define the
address of the first data byte (Figure 5-2). Because all
A15…A0 are used, there are no upper address bits that
are “don’t care”. The upper address bits are transferred
first, followed by the Less Significant bits.
Following the Start condition, the 24XX512 monitors
the SDA bus checking the device type identifier being
transmitted. Upon receiving a ‘ 1010 ’ code and appro-
priate device select bits, the slave device outputs an
Acknowledge signal on the SDA line. Depending on the
state of the R/W bit, the 24XX512 will select a read or
write operation.
Multiple Devices
The Chip Select bits A2, A1 and A0 can be used to
expand the contiguous address space for up to 4 Mbit
by adding up to eight 24XX512 devices on the same
bus. In this case, software can use A0 of the control
byte as address bit A16; A1 as address bit A17; and A2
as address bit A18. It is not possible to sequentially
read across device boundaries.
FIGURE 5-2:
ADDRESS SEQUENCE BIT ASSIGNMENTS
Control Byte
Address High Byte
Address Low Byte
0 R/W
1
0
1
0
A
2
A
1
A
A A A A A A
15 14 13 12 11 10
A
9
A
8
A
7
?
?
?
?
?
?
A
0
Control
Code
Chip
Select
Bits
? 2010 Microchip Technology Inc.
DS21754M-page 9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 24LC512SC/S16K | 制造商:Microchip Technology Inc 功能描述:512K I2C SMARTCARD EE DIE IN WAFFLE PK - Gel-pak, waffle pack, wafer, diced wafer on film |
| 24LC512SC/W16K | 制造商:Microchip Technology Inc 功能描述:512K I2C SMARTCARD EE WAFER - Gel-pak, waffle pack, wafer, diced wafer on film |
| 24LC512SC/WF16K | 制造商:Microchip Technology Inc 功能描述:512K I2C SMARTCARD EE WAFER ON FRAME - Gel-pak, waffle pack, wafer, diced wafer on film |
| 24LC512SC-I/S16K | 制造商:Microchip Technology Inc 功能描述:512K I2C SMARTCARD EE DIE IN W - Gel-pak, waffle pack, wafer, diced wafer on film |
| 24LC512SC-I/W16K | 制造商:Microchip Technology Inc 功能描述:512K I2C SMARTCARD EE WAFER, IND - Gel-pak, waffle pack, wafer, diced wafer on film |
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