AM29F400AB データシートの表示（PDF） - Advanced Micro Devices
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AM29F400AB
Advanced Micro Devices
AM29F400AB Datasheet PDF : 35 Pages
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PRELIMINARY
Table 5. Sector Address Tables (Am29F400AT)
(x8) Address
(x16) Address
A17
A16
A15
A14
A13
A12
Range
Range
SA0
0
0
0
X
X
X
00000h-0FFFFh 00000h-07FFFh
SA1
0
0
1
X
X
X
10000h-1FFFFh 08000h-0FFFFh
SA2
0
1
0
X
X
X
20000h-2FFFFh 10000h-17FFFh
SA3
0
1
1
X
X
X
30000h-3FFFFh 18000h-1FFFFh
SA4
1
0
0
X
X
X
40000h-4FFFFh 20000h-27FFFh
SA5
1
0
1
X
X
X
50000h-5FFFFh 28000h-2FFFFh
SA6
1
1
0
X
X
X
60000h-6FFFFh 30000h-37FFFh
SA7
1
1
1
0
X
X
70000h-77FFFh 38000h-3BFFFh
SA8
1
1
1
1
0
0
78000h-79FFFh 3C000h-3CFFFh
SA9
1
1
1
1
0
1
7A000h-7BFFFh 3D000h-3DFFFh
SA10
1
1
1
1
1
X
7C000h-7FFFFh 3E000h-3FFFFh
Table 6. Sector Address Tables (Am29F400AB)
(x8) Address
(x16) Address
A17
A16
A15
A14
A13
A12
Range
Range
SA0
0
0
0
0
0
X
00000h-03FFFh
00000h-01FFFh
SA1
0
0
0
0
1
0
04000h-05FFFh
02000h-02FFFh
SA2
0
0
0
0
1
1
06000h-07FFFh
03000h-03FFFh
SA3
0
0
0
1
X
X
08000h-0FFFFh 04000h-07FFFh
SA4
0
0
1
X
X
X
10000h-1FFFFh 08000h-0FFFFh
SA5
0
1
0
X
X
X
20000h-2FFFFh 10000h-17FFFh
SA6
0
1
1
X
X
X
30000h-3FFFFh 18000h-1FFFFh
SA7
1
0
0
X
X
X
40000h-4FFFFh 20000h-27FFFh
SA8
1
0
1
X
X
X
50000h-5FFFFh 28000h-2FFFFh
SA9
1
1
0
X
X
X
60000h-6FFFFh 30000h-37FFFh
SA10
1
1
1
X
X
X
70000h-7FFFFh 38000h-3FFFFh
Write
Device erasure and programming are accomplished via
the command register. The contents of the register serve
as inputs to the internal state machine. The state ma-
chine outputs dictate the function of the device.
The command register itself does not occupy any ad-
dressable memory location. The register is a latch used
to store the commands, along with the address and data
information needed to execute the command. The com-
mand register is written to by bringing WE to VIL, while
CE is at VIL and OE is at VIH. Addresses are latched on
the falling edge of WE or CE, whichever happens later;
while data is latched on the rising edge of WE or CE,
whichever happens first. Standard microprocessor write
timings are used.
Refer to AC Write Characteristics and the Erase/Pro-
gramming Waveforms for specific timing parameters.
Sector Protection
The Am29F400A features hardware sector protection.
This feature will disable both program and erase opera-
tions in any combination of ten sectors of memory. The
sector protect feature is enabled using programming
equipment at the user’s site. The device is shipped with
all sectors unprotected. Alternatively, AMD may program
and protect sectors in the factory prior to shipping the
device (AMD’s ExpressFlash™ Service).
10
Am29F400AT/Am29F400AB
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