CAT24C208
DSP Interface
The DSP interface is similar to I 2 C bus serial interface.
Without the segment pointer, the maximum accessible
memory space is 256 bytes of segment 00h only. In the
sequential mode the wrap around will be in the same
segment also. Figures 14 to 17 show the read and write on
the DSP Port.
START
1010 0000
ACK
A7 ? A0 ADDRESS
ACK
START
1010 0001
ACK
DATA
NOACK
STOP
Figure 14. Random Access Read
START 1010 0000 ACK A7 ? A0 ADDRESS
ACK START 1010 0001
ACK
DATA0
ACK
.........
DATAN
NOACK STOP
Figure 15. Sequential Read
START
1010 0000
ACK
A7 ? A0 ADDRESS
ACK
DATA
ACK
STOP
Figure 16. Byte Write
START
1010 0000
ACK
A7 ? A0 ADDRESS
ACK
DATA0
ACK
.........
DATA15
ACK
STOP
Figure 17. Page Write
The segment pointer is used to expand the available DSP
port addressable memory to 1 k bytes, divided into four
segments of 256 bytes each. The four segments are selected
by two bits S 1 S 0 = 00, 01, 10, 11 in the segment address.
Figures 18 to 21 show the random read, sequential read, byte
write and page write.
START
0110 0000
ACK
xxxx xxS 1 S 0 Segment ADDRESS
ACK
START
1010 0000
ACK
A7 ? A0 ADDRESS
ACK
START
1010 0001 ACK
DATA NOACK STOP
Figure 18. Random Access Read
START 0110 0000 ACK
xxxx xxS 1 S 0 Segment ADDRESS
ACK
START 1010 0000 ACK
A7 ? A0 ADDRESS
ACK
START
1010 0001 ACK DATA0 ACK ......... DATAN NOACK STOP
Figure 19. Sequential Read
START
0110 0000
ACK
xxxx xxS 1 S 0 Segment ADDRESS
ACK
START
1010 0000
ACK
A7 ? A0 ADDRESS
ACK
DATA
ACK
STOP
Figure 20. Byte Write
START 0110 0000 ACK
xxxx xxS 1 S 0 Segment ADDRESS
ACK
START 1010 0000 ACK
A7 ? A0 ADDRESS
ACK
DATA0
ACK
.........
DATA15
ACK
STOP
Figure 21. Page Write
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相关PDF资料
CAT24C21LI IC EEPROM SERIAL 1KB DUAL 8PDIP
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相关代理商/技术参数
CAT24C21LI 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
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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CAT24C21ZI 制造商:Catalyst Semiconductor 功能描述: