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參數(shù)資料
| 型號： | HCS412P |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | KEELOQ Code Hopping Encoder and Transponder |
| 中文描述： | 而Keeloq跳碼編碼器和轉(zhuǎn)發(fā)器 |
| 文件頁數(shù)： | 25/44頁 |
| 文件大小： | 704K |
| 代理商： | HCS412P |
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2002 Microchip Technology Inc.
Preliminary
DS41099C-page 25
HCS412
FIGURE 4-9:
PROGRAM SEQUENCE - CONSECUTIVE WORDS
FIGURE 4-10: PROGRAMMING - VERIFICATION
4.3.6
IFF CHALLENGE AND RESPONSE
The transponder reader sends one of four possible IFF
commands indicating which crypt key and which algo-
rithm to use to encrypt the challenge (Table 4-7).
The command is followed by the 32-bit challenge, typi-
cally a random number. The HCS412 encrypts the
challenge using the designated crypt key and algorithm
and responds with the 32-bit encrypted result. The
reader authenticates the response by comparing it to
the expected value.
The second crypt key and the seed value occupy the
same EEPROM storage area. To use the second crypt
key for IFF, the Seed Enable (SEED) and the Tempo-
rary Seed Enable (TMPSD) configuration options must
be disabled.
TABLE 4-7:
CHALLENGE AND RESPONSE COMMANDS
Communication from reader to HCS412
Communication from HCS412 to reader
A
P
C
T
C
1
K
S
A
S
A
S
A
S
A
1
K
1
C
1
R
’
L
M
L
M
L
M
L
M
Write 18x16-bit
words total.
Start
Verify
Communication from reader to HCS412
Communication from HCS412 to reader
A
P
C
T
1
K
S
A
1
A
S
A
Write 18x16-bit
words total.
1
T
‘
+
K
1
T
+
K
1
T
+
C
1
T
+
R
Verify 18x16-bit
words total.
L
M
L
M
L
M
L
M
0
1
01b Preamble
Start
1 LF
TE
16-bit
Response
L
M
3LF
TE
Delay between
each 16-bit word
Approximately 1ms
delay before verify
begins.
1
T
+
K
L
M
Note:
If seed transmissions are not appropriately
disabled, the HCS412 will default to using
KEY1 for IFF.
Command
Description
Expected data In
Response
10000
IFF using key-1 and IFF algorithm
IFF using key-1 and HOP algorithm
IFF using key-2 and IFF algorithm
IFF using key-2 and HOP algorithm
32-Bit Challenge
32-Bit Challenge
32-Bit Challenge
32-Bit Challenge
32-Bit Response
32-Bit Response
32-Bit Response
32-Bit Response
10001
10100
10101
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HCS412SN | KEELOQ Code Hopping Encoder and Transponder |
| HCS412T | KEELOQ Code Hopping Encoder and Transponder |
| HCS412TI | KEELOQ Code Hopping Encoder and Transponder |
| HCS412TP | Dual PCI 2.2 Hot-Swap Controllers |
| HCS412 | Code Hopping Encoder and Transponder(編碼器和收發(fā)兩用機(jī)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HCS412SN | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder and Transponder |
| HCS412T | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder and Transponder |
| HCS412T/SN | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 w/ Passive Entry RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| HCS412TI | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder and Transponder |
| HCS412T-I/SN | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 w/ Passive Entry RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
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