參數(shù)資料
型號(hào): S29PL032J65BFI150
廠商: SPANSION LLC
元件分類(lèi): PROM
英文描述: 2M X 16 FLASH 3V PROM, 65 ns, PBGA56
封裝: 7 X 9 MM, LEAD FREE, FBGA-56
文件頁(yè)數(shù): 50/94頁(yè)
文件大?。?/td> 949K
代理商: S29PL032J65BFI150
52
S29PL-J
S29PL-J_00_A8 July 29, 2005
Ad van c e
Inf o rmation
Figure 8 Secured Silicon Sector Protect Verify
Hardware Data Protection
The command sequence requirement of unlock cycles for programming or erasing provides data
protection against inadvertent writes. In addition, the following hardware data protection mea-
sures prevent accidental erasure or programming, which might otherwise be caused by spurious
system level signals during VCC power-up and power-down transitions, or from system noise.
Low VCC Write Inhibit
When VCC is less than VLKO, the device does not accept any write cycles. This protects data during
VCC power-up and power-down. The command register and all internal program/erase circuits
are disabled, and the device resets to the read mode. Subsequent writes are ignored until VCC is
greater than VLKO. The system must provide the proper signals to the control pins to prevent un-
intentional writes when VCC is greater than VLKO.
Write Pulse “Glitch” Protection
Noise pulses of less than 3 ns (typical) on OE#, CE#, (CE1#, CE2# in PL129J) or WE# do not
initiate a write cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of OE# = VIL, CE# (CE1# = CE2# in PL129J)= VIH
or WE# = VIH. To initiate a write cycle, CE# (CE1# / CE2# in PL129J) and WE# must be a logical
zero while OE# is a logical one.
Power-Up Write Inhibit
If WE# = CE# (CE1#, CE2# in PL129J) = VIL and OE# = VIH during power up, the device does
not accept commands on the rising edge of WE#. The internal state machine is automatically
reset to the read mode on power-up.
Write 60h to
any address
Write 40h to SecSi
Sector address
with A6 = 0,
A1 = 1, A0 = 0
START
RESET# =
VIH or VID
Wait 1
μs
Read from SecSi
Sector address
with A6 = 0,
A1 = 1, A0 = 0
If data = 00h,
SecSi Sector is
unprotected.
If data = 01h,
SecSi Sector is
protected.
Remove VIH or VID
from RESET#
Write reset
command
SecSi Sector
Protect Verify
complete
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