參數(shù)資料
型號(hào)： 28F640C3
廠商： Intel Corp.
英文描述： 3 Volt Advanced Boot Block Flash Memory(3 V 高級(jí)快速引導(dǎo)塊閃速存儲(chǔ)器)
中文描述： 3伏高級(jí)啟動(dòng)塊閃存（3伏高級(jí)快速引導(dǎo)塊閃速存儲(chǔ)器）
文件頁(yè)數(shù)： 26/70頁(yè)
文件大小： 894K
代理商： 28F640C3
28F800C3, 28F160C3, 28F320C3, 28F640C3
20
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The 12 V V
PP
mode enhances programming performance during the short period of time typically
found in manufacturing processes; however, it is not intended for extended use. 12 V may be
applied to V
PP
during program and erase operations for a maximum of 1000 cycles on the main
blocks and 2500 cycles on the parameter blocks. V
PP
may be connected to 12 V for a total of 80
hours maximum. Stressing the device beyond these limits may cause permanent damage.
3.5.2
V
PP
≤
V
PPLK
for Complete Protection
In addition to the flexible block locking, the V
PP
programming voltage can be held low for absolute
hardware write protection of all blocks in the flash device. When V
PP
is below V
PPLK
, any
program or erase operation will result in a error, prompting the corresponding status register bit
(SR.3) to be set.
0645_06
NOTE:
1. A resistor can be used if the V
supply can sink adequate current based on resistor value. See AP-657
Designing with the Advanced+ Boot Block Flash Memory Architecturefor details.
3.6
Power Consumption
Intel Flash devices have a tiered approach to power savings that can significantly reduce overall
system power consumption. The Automatic Power Savings (APS) feature reduces power
consumption when the device is selected but idle. If the CE# is deasserted, the flash enters its
standby mode, where current consumption is even lower. The combination of these features can
minimize memory power consumption, and therefore, overall system power consumption.
3.6.1
Active Power (Program/Erase/Read)
With CE# at a logic
-
low level and RP# at a logic
-
high level, the device is in the active mode. Refer
to the DC Characteristic tables for I
CC
current values. Active power is the largest contributor to
overall system power consumption. Minimizing the active current could have a profound effect on
system power consumption, especially for battery
-
operated devices.
Figure 5. Example Power Supply Configurations
V
CC
V
PP
12 V Fast Programming
Absolute Write Protection With V
PP
≤
V
PPLK
System Supply
12 V Supply
10
≤
K
V
CC
V
PP
System Supply
12 V Supply
Low Voltage and 12 V Fast Programming
V
CC
V
PP
System Supply
Prot#
(Logic Signal)
V
CC
V
PP
System Supply
Low-Voltage Programming
Low-Voltage Programming
Absolute Write Protection via Logic Signal
(Note 1)
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