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參數(shù)資料
| 型號： | AM29F017D-120FD |
| 廠商： | SPANSION LLC |
| 元件分類： | PROM |
| 英文描述： | 2M X 8 FLASH 5V PROM, 120 ns, PDSO48 |
| 封裝： | MO-142DD, TSOP-48 |
| 文件頁數(shù)： | 6/46頁 |
| 文件大小： | 1387K |
| 代理商： | AM29F017D-120FD |
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12
Am29F017D
July 29, 2005
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equipment
to automatically match a device to be programmed with
its corresponding programming algorithm. However,
the autoselect codes can also be accessed in-system
through the command register.
When using programming equipment, the autoselect
mode requires VID (11.5 V to 12.5 V) on address pin
A9. Address pins A6, A1, and A0 must be as shown in
Autoselect Codes (High Voltage Method) table. In addi-
tion, when verifying sector protection, the sector ad-
dress must appear on the appropriate highest order
address bits. Refer to the corresponding Sector Ad-
dress Tables. The Command Definitions table shows
the remaining address bits that are don’t care. When all
necessary bits have been set as required, the program-
ming equipment may then read the corresponding
identifier code on DQ7–DQ0.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in the Command Defini-
tions table. This method does not require VID. See
“Command Definitions” for details on using the autose-
lect mode.
Table 3.
Am29F017D Autoselect Codes (High Voltage Method)
L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.
Sector Group Protection/Unprotection
The hardware sector group protection feature dis-
ables both program and erase operations in any sec-
tor. Each sector group consists of four adjacent
sectors. Table 4 shows how the sectors are goruped,
and the address range that each sector group con-
tains. The hardware sector group unprotection fea-
ture re-enables both program and erase operations in
previously protected sectors.
Sector group protection/unprotection must be imple-
mented using programming equipment. The procedure
requires a high voltage (VID) on address pin A9 and the
control pins. Details on this method are provided in a
supplement, publication number 23923. Contact an
AMD representative to obtain a copy of the appropriate
document. Note that the sector group protection and
unprotection scheme differs from that used with the
previous versions of this device, the Am29F017B.
The device is shipped with all sector groups unpro-
tected. AMD offers the option of programming and pro-
tecting sectors at its factory prior to shipping the device
through AMD’s ExpressFlash Service. Contact an
AMD representative for details.
It is possible to determine whether a sector group is
protected or unprotected. See “Autoselect Mode” for
details.
Table 4.
Sector Group Addresses
Temporary Sector Group Unprotect
This feature allows temporary unprotection of previ-
ously protected sectors groups to change data in-sys-
tem. The Sector Group Unprotect mode is activated
by setting the RESET# pin to VID. During this mode,
formerly protected sector groups can be programmed
or erased by selecting the sector group addresses.
Once VID is removed from the RESET# pin, all the
Description
CE#
OE# WE# A20-A18
A17-A10
A9
A8-A7
A6
A5-A2
A1
A0
DQ7-DQ0
Manufacturer ID:
AMD
L
H
X
VID
X
VIL
X
VIL
01h
Device ID:
Am29F017D
L
H
X
VID
X
VIL
X
VIL
VIH
3Dh
Sector Group
Protection
Verification
L
H
Sector
Group
Address
X
VID
X
VIL
X
VIH
VIL
01h (protected)
00h (unprotected)
Sector
Group
A20
A19
A18
Sectors
SGA0
0
SA0
–SA3
SGA1
0
1
SA4
–SA7
SGA2
0
1
0
SA8
–SA11
SGA3
0
1
SA12
–SA15
SGA4
1
0
SA16
–SA19
SGA5
1
0
1
SA20
–SA23
SGA6
1
0
SA24
–SA27
SGA7
1
SA28
–SA31
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