- 您现在的位置：买卖IC网 > PDF目录298899 > CA95C09-16CT TELECOM, DATA ENCRYPTION CIRCUIT, PQFP44 PDF资料下载
参数资料
| 型号： | CA95C09-16CT |
| 元件分类： | 加密电路 |
| 英文描述： | TELECOM, DATA ENCRYPTION CIRCUIT, PQFP44 |
| 封装： | TQFP-44 |
| 文件页数： | 22/42页 |
| 文件大小： | 180K |
| 代理商： | CA95C09-16CT |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页
Tundra Semiconductor Corporation
CA95C68/18/09
Tundra Semiconductor Corporation
3-53
PROGRAMMING INSTRUCTIONS FOR MULTIPLEXED CONTROL MODE
4)
One of the three Start commands is then written to the
Command Register to begin the ciphering session.
5)
Once a Start command is entered, the DCP will indicate
that it is ready for data input by activating the
corresponding ag bit in the Status Register, as well as
the associated input ag pin. Data can now be input
through the assigned Input Port. The two ags,
and
, which are associated with the Data Registers
can be sensed by hardware or software to know when
data is to be entered or removed from the DCP.
6)
As soon as the Input ag is active, the DCP is ready to
accept data (MSB rst). This bit is deactivated once eight
bytes of data have been entered.
7)
The Output ag goes active whenever the DES algorithm
is completed and data is ready to be removed from the
Output Register.
8)
Data is removed from the Output Port one byte at a time
with the most signicant byte rst. The Output ag
becomes inactive upon the removal of the eighth byte.
9)
Loop through steps 5 through 9 until the ciphering
session should be terminated.
10) The session can now be terminated by issuing the Stop
command to the Command Register.
Upon termination, all remaining processed data is available in
the Output Register until the DCP is reset. This allows you to
enter the Stop command immediately upon entering the last
input block. When all the data has been removed from the
Output Register, all the ags will be inactive. If the DCP is
restarted, any data that was not read out from the previous
ciphering session will be lost.
MFLG
SFLG
This section describes the registers that need programming
prior to using the DCP in ECB, CBC, or CFB ciphering
modes in Multiplexed Control Mode (MCM) of operation.
The
programming
ow
charts
for
each
mode
are
implemented for a single 8 bit port interface (see the
pipelining section for the dual port programming ow chart).
ECB Operation
Figure 3-18 illustrates the programming sequence for ECB.
1)
A hardware or software reset must be implemented to
bring the device to a known state. A reset clears all bits
in the Status Register and programs the Mode Register
to it's default setting.
2)
Program the Mode Register (see Figure 3-16) with the
cipher type and the port conguration. For further
explanation see the Mode Register description.
3)
The clear Encryption or Decryption Keys can be loaded
through either the Master or Auxiliary Ports. The
Command Pending bit in the Status Register will go
active once a command has been entered in the
Command Register. This bit will be active until all eight
bytes of the key have been loaded into the Input
Register of the DCP.
An alternative method to Step 3 is to load a Master Key
into the DCP through the Auxiliary Port. When this
command is entered the AFLG bit in the Status Register
will go active (
output pin will be active low) until
all 8 bytes have been entered. One key byte is loaded on
each rising edge of the Auxiliary Strobe (
).
A Load Encrypted Session Key command is then
entered into the DCP. The Session Key is then decrypted
by the Master Key before being stored in the
corresponding register. This use of the Master Key
allows you to enhance security by frequently changing
the session keys over a communication link.
AFLG
ASTB
相关PDF资料 |
PDF描述 |
|---|---|
| CA95C09-20CT | TELECOM, DATA ENCRYPTION CIRCUIT, PQFP44 |
| CA95C09-25CT | TELECOM, DATA ENCRYPTION CIRCUIT, PQFP44 |
| CA95C09-33CT | TELECOM, DATA ENCRYPTION CIRCUIT, PQFP44 |
| CA95C09-5CT | TELECOM, DATA ENCRYPTION CIRCUIT, PQFP44 |
| CAR2813C | 40 MHz - 300 MHz RF/MICROWAVE WIDE BAND MEDIUM POWER AMPLIFIER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CA96 | 制造商:Datak Corporation 功能描述: |
| CA9623-000 | 功能描述:CABLE RoHS:是 类别:线缆，导线 >> 同轴 系列:- 产品培训模块:General Cable 标准包装:1 系列:- 缆线类型:细电缆网 - 耐热阻燃型 缆线组:RG-58 线规:20 AWG（0.62mm²） 线束:19 股 / 32 AWG 套管类型:聚氯乙烯（PVC） 套管直径:0.186"（4.72mm） 屏蔽类型:箔，编织线 阻抗:50 欧姆 长度:100' (30.5m) 颜色:灰 使用:网络 特点:- 导线材料:铜，镀锡 电介质材料:多孔（泡沫）聚乙烯（多孔 FPE） 电介质直径:0.100"（2.54mm） 屏蔽材料:Flexfoil?; 铜，镀锡 屏蔽覆盖范围:100%，81% VoP，传输速度:80 工作温度:- 其它名称:C5779-100 |
| CA9652-000 | 制造商:TE Connectivity 功能描述:- Bulk |
| CA9681-000 | 制造商:TE Connectivity 功能描述:CA9681-000 |
| CA9809-000 | 制造商:TE Connectivity 功能描述:Heat Shrink Molded Boot 制造商:TE Connectivity 功能描述:222K142-25-CS-2101-0 - Bulk |
发布紧急采购，3分钟左右您将得到回复。