AT88SC102 查看數據表（PDF） - Unspecified
零件编号
产品描述 (功能)
生产厂家
AT88SC102 Datasheet PDF : 26 Pages
| |||
• EC2EN Fuse
This fuse selects whether the EC2 counter is used to limit the number of Application Zone 2
erases allowed in Security Mode 2. If the EC2EN fuse is “unblown”, then the Application Zone 2
erases are limited to 128. If the EC2EN fuse is “blown”, the application zone erases are unlim-
ited. After the issuer fuse is blown, the state of the EC2EN fuse is locked and cannot be
changed.
• Issuer Fuse
This fuse is used to personalize the AT88SC102 for end use. It is an additional EEPROM bit that
can be programmed to a logic “0”. This is its “blown” state. Security of the device when the
issuer fuse is a logic “1” is described in Table 1. The device is in Security Level 2 when the
issuer fuse is blown. The device can also be placed in Security Level 2 by taking the FUS pin
low independent of the state of issuer fuse. Memory access rules of the device in Security Level
2 are described in Table 2.
9. Memory Access Rules During Personalization – Security Mode 1(1)
Table 9-1. Access Conditions During Personalization (issuer fuse not blown)
Zone
SV(2)
R1(3)
R2(4)
MF(5)
Read
Erase
Write
FZ
x
x
x
x
yes
no
no
IZ
0
x
1
x
x
x
x
yes
no
no
x
yes
yes
yes
SC
0
1
x
x
x
x
x
x
no
no
no
yes
yes
yes
SCAC
0
1
x
x
x
x
x
x
yes
no
yes
yes
yes
yes
CPZ
0
1
x
x
x
x
x
x
yes
no
no
yes
yes
yes
0
0
x
x
no
no
no
AZ1
0
1
x
x
yes
no
no
1
x
x
x
yes
yes
yes
EZ1
0
1
x
x
x
x
x
x
no
no
no
yes
yes
yes
0
x
0
x
no
no
no
AZ2
0
x
1
x
yes
no
no
1
x
x
x
yes
yes
yes
EZ2
0
1
x
x
x
x
x
x
no
no
no
yes
yes
yes
EC2
0
1
x
x
x
x
x
x
yes
no
yes
yes
yes
yes
MTZ
x
x
x
x
yes
yes
yes
0
x
x
x
yes
no
no
MFZ
1
x
x
0
yes
no
no
1
x
x
1
yes
yes
yes
Notes:
1. Security Mode 1 Conditions:
EC2EN = “1” or “0”
Issuer Fuse = “1”
FUS Pin = “1” (required)
2. SV = “1” after validation of the security code
Compare
no
no
no
yes
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
no
10 AT88SC102
1419C–SMEM–6/08
Share Link: 