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Intel Advanced+ Boot Block Flash Memory (C3)
5.6.1
Program Protection
In addition to the flexible block locking, the V programming voltage can be held low for absolute
PP
hardware write protection of all blocks in the flash device. When V is below or equal to V
,
PP
PPLK
any Program or Erase operation will result in an error, prompting the corresponding status-register
bit (SR[3]) to be set.
Figure 7. Example Power Supply Configurations
System Supply
System Supply
VCC
VPP
VCC
12 V Supply
VPP
Prot#
(Logic Signal)
10
≤ KΩ
12 V Fast Programming
Low-Voltage Programming
Absolute Write Protection With V
≤
VPPLK
Absolute Write Protection via Logic Signal
PP
System Supply
(Note 1)
System Supply
VCC
VCC
VPP
VPP
12 V Supply
Low Voltage and 12 V Fast Programming
Low-Voltage Programming
0645_06
NOTE:
1. A resistor can be used if the VCC supply can sink adequate current based on resistor value. See AP-657
Designing with the Advanced+ Boot Block Flash Memory Architecture for details.
Datasheet
31
INTEL [ INTEL ]
