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参数资料
| 型号： | CAT24C21PE |
| 元件分类： | PROM |
| 英文描述： | 128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8 |
| 封装： | PLASTIC, DIP-8 |
| 文件页数： | 10/12页 |
| 文件大小： | 65K |
| 代理商： | CAT24C21PE |
CAT24C21
7
Doc. No. 1032, Rev. N
Figure 6. Start/Stop Timing
Figure 7. Acknowledge Timing
ACKNOWLEDGE
1
START
SCL FROM
MASTER
89
DATA OUTPUT
FROM TRANSMITTER
DATA OUTPUT
FROM RECEIVER
Figure 8. Slave Address Bits
1
0
1
0
X
R/W
Page Write
The CAT24C21 writes up to 16 bytes of data in a single
write cycle, using the Page Write operation. The Page
Write operation (Figure 10) is initiated in the same
manner as the Byte Write operation, however instead of
terminating after the initial word is transmitted, the
Master is allowed to send up to fifteen additional bytes.
After each byte has been transmitted the CAT24C21 will
respond with an ACK, and internally increment the low
order address bits by one. The high order bits remain
unchanged.
If the Master transmits more than sixteen bytes prior to
sending the STOP condition, the address counter ‘wraps
around’, and previously transmitted data will be
overwritten.
Once all sixteen bytes are received and the STOP
condition has been sent by the Master, the internal
programming cycle begins. At this point all received data
is written to the CAT24C21 in a single write cycle.
Acknowledge Polling
The disabling of the inputs can be used to take advantage
of the typical write cycle time. Once the stop condition
is issued to indicate the end of the host’s write operation,
the CAT24C21 initiates the internal write cycle. ACK
polling can be initiated immediately.
This involves
issuing the start condition followed by the slave address
for a write operation. If the CAT24C21 is still busy with
the write operation, no ACK will be returned. If the
CAT24C21 has completed the write operation, an ACK
will be returned and the host can then proceed with the
next read or write operation.
START Bit
SDA
STOP Bit
SCL
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT24C21WGI | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT24C21WGI-T3 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT24C21WI | 功能描述:电可擦除可编程只读存储器 1K Dual Mode Serial 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 |
| CAT24C21WI-G | 制造商:Rochester Electronics LLC 功能描述: 制造商:ON Semiconductor 功能描述: |
| CAT24C21WI-GT3 | 功能描述:电可擦除可编程只读存储器 1K DUAL MODE SER 电可擦除可编程只读存储器 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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