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参数资料
| 型号： | CLRC63201T |
| 厂商： | NXP Semiconductors N.V. |
| 元件分类： | 通信及网络 |
| 英文描述： | Multiple protocol contactless reader IC (MIFARE-I-CODE1) |
| 封装： | CLRC63201T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 5, 2005,; |
| 文件页数： | 37/126页 |
| 文件大小： | 719K |
| 代理商： | CLRC63201T |
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CLRC632_35
NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.5 — 10 November 2009
073935
18 of 126
NXP Semiconductors
CLRC632
Multiple protocol contactless reader IC (MIFARE/I-CODE1)
9.2.3 Crypto1 keys (write only)
MIFARE security requires specic cryptographic keys to encrypt data stream
communication on the contactless interface. These keys are called Crypto1 keys.
9.2.3.1
Key format
Keys stored in the EEPROM are written in a specic format. Each key byte must be split
into lower four bits k0 to k3 (lower nibble) and the higher four bits k4 to k7 (higher nibble).
Each nibble is stored twice in one byte and one of the two nibbles is bit-wise inverted. This
format is a precondition for successful execution of the LoadKeyE2 (see Section 11.7.1 on
page 97) and LoadKey commands (see Section 11.7.2 on page 97).
Using this format, 12 bytes of EEPROM memory are needed to store a 6-byte key. This is
shown in Figure 7.
Example: The value for the key must be written to the EEPROM.
If the key was: A0h A1h A2h A3h A4h A5h then
5Ah F0h 5Ah E1h 5Ah D2h 5Ah C3h 5Ah B4h 5Ah A5h would be written.
Remark: It is possible to load data for other key formats into the EEPROM key storage
location. However, it is not possible to validate card authentication with data which will
cause the LoadKeyE2 command (see Section 11.7.1 on page 97) to fail.
9.2.3.2
Storage of keys in the EEPROM
The CLRC632 reserves 384 bytes of memory in the EEPROM for the Crypto1 keys. No
memory segmentation is used to mirror the 12-byte structure of key storage. Thus, every
byte of the dedicated memory area can be the start of a key.
Example: If the key loading cycle starts at the last byte address of an EEPROM block, (for
example, key byte 0 is stored at 12Fh), the next bytes are stored in the next EEPROM
block, for example, key byte 1 is stored at 130h, byte 2 at 131h up to byte 11 at 13Ah.
Based on the 384 bytes of memory and a single key needing 12 bytes, then up to 32
different keys can be stored in the EEPROM.
Remark: It is not possible to load a key exceeding the EEPROM byte location 1FFh.
Fig 7.
Key storage format
001aak640
0 (LSB)
Master key byte
Master key bits
EEPROM byte
address
Example
k7 k6 k5 k4 k7 k6 k5 k4
n
5Ah
k3 k2 k1 k0 k3 k2 k1 k0
n + 1
F0h
1
k7 k6 k5 k4 k7 k6 k5 k4
n + 2
5Ah
k3 k2 k1 k0 k3 k2 k1 k0
n + 3
E1h
5 (MSB)
k7 k6 k5 k4 k7 k6 k5 k4
n + 10
5Ah
k3 k2 k1 k0 k3 k2 k1 k0
n + 11
A5h
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相关代理商/技术参数 |
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|---|---|
| CLRC63201T/0FE | 制造商:NXP Semiconductors 功能描述: |
| CLRC63201T/0FE,112 | 功能描述:RFID应答器 I.CODE HS READER RoHS:否 制造商:Murata 存储容量:512 bit 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| CLRC63201T/0FE,118 | 制造商:NXP Semiconductors 功能描述:Interface Misc |
| CLRC63201T/0FE112 | 制造商:NXP Semiconductors 功能描述:CNTCLESS RC 5V ISO14443 + ISO15693 |
| CLRC663 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Contactless reader IC |
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