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參數(shù)資料
| 型號(hào)： | SCS152-IW |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Small glass bead with axial leads |
| 中文描述： | 而Keeloq令牌卡芯片 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 182K |
| 代理商： | SCS152-IW |
SCS152
DS40150B-page 12
Preliminary
1997 Microchip Technology Inc.
6.0
PERSONALIZATION
During the typical life of the device, it must be person-
alized. The following procedure personalizes the
device:
1.
Issue a RESET command.
2.
Issue 147 RDBIT commands.
3.
Issue 64 PUTBIT commands to present the
transport code.
4.
Issue 88 RDBIT commands.
5.
Program the SER field by issuing BITPROG
commands at the appropriate addresses.
6.
Decrement each digit in the token counter to the
proper value by issuing BITPROG and RDBIT
commands as needed.
7.
Program the USER area.
8.
Program the UKEY0 area by clocking to the first
bit of each byte (i.e., addresses 148, 156,
164, …) issuing BITPROG and ERASE com-
mands, and then programming the byte with
BITPROG commands.
9.
Check the contents via the signature function.
10. Set the device to user mode by issuing
a BITPROG commands at addresses 104 and
105.
7.0
MEMORY CONTENTS
7.1
Shipped Devices
7.2
After Personalization
Note:
The internal transport code OK status bit is
reset by the RESET command or when the
device is no longer in issuer mode (which
happens when PC0 and PC1 are pro-
grammed).
Field Name
Contents
CID
SER
ISS
D4
D3
D2
D1
D0
CFG
USER0
UKEY0
Chip identification data
all 1
1
all 1
all 1
all 1
all 1
all 1
PC0 = 0, PC1 = 1, LOCK0 = 1
All 1
Transport code
Field Name
Contents
CID
SER
ISS
D4
D3
D2
D1
D0
CFG
Chip identification data
Device serial number
0
Digit 4 of counter
Digit 3 of counter
Digit 2 of counter
Digit 1 of counter
Digit 0 of counter
PC0 = 1, PC1 = 0,
LOCK0 = 1/0 depending on application
All 1
Transport code
USER0
UKEY0
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