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L320DB90VC датащи(PDF) 12 Page - Advanced Micro Devices

номер детали L320DB90VC
подробное описание детали  32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Boot Sector Flash Memory
PDF  57 Pages
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производитель  AMD [Advanced Micro Devices]
домашняя страница  http://www.amd.com
Logo AMD - Advanced Micro Devices

L320DB90VC датащи(HTML) 12 Page - Advanced Micro Devices

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10
Am29LV320D
December 14, 2005
DA TA SH EET
DEVICE BUS OPERATIONS
This section describes the requirements and use of
the device bus operations, which are initiated through
the internal command register. The command register
itself does not occupy any addressable memory loca-
tion. The register is a latch used to store the com-
mands, along with the address and data information
needed to execute the command. The contents of the
register serve as inputs to the internal state machine.
The state machine outputs dictate the function of the
device. Table 1 lists the device bus operations, the in-
puts and control levels they require, and the resulting
output. The following subsections describe each of
these operations in further detail.
Table 1.
Am29LV320D Device Bus Operations
Legend: L = Logic Low = V
IL, H = Logic High = VIH, VID = 11.5–12.5 V, VHH = 11.5–12.5 V, X = Don’t Care, SA = Sector Address,
A
IN = Address In, DIN = Data In, DOUT = Data Out
Notes:
1. Addresses are A20:A0 in word mode (BYTE# = V
IH), A20:A-1 in byte mode (BYTE# = VIL).
2. The sector protect and sector unprotect functions may also be implemented via programming equipment. See “Sector/Sector
Block Protection and Unprotection” on page 17.
3. If WP#/ACC = V
IL, the two outermost boot sectors remain protected. If WP#/ACC = VIH, the two outermost boot sector protection
depends on whether they were last protected or unprotected using the method described in “Sector/Sector Block Protection and
Unprotection” on page 17. If WP#/ACC = V
HH, all sectors are unprotected.
4. D
IN or DOUT as required by command sequence, data polling, or sector protection algorithm.
Operation
CE#
OE#
WE#
RESET#
WP#/ACC
Addresses
(Note 2)
DQ0–
DQ7
DQ8–DQ15
BYTE#
= V
IH
BYTE#
= V
IL
Read
L
L
H
H
L/H
A
IN
D
OUT
D
OUT
DQ8–DQ14
= High-Z,
DQ15 = A-1
Write
L
H
L
H
(Note 3)
A
IN
(Note 4) (Note 4)
Accelerated Program
L
H
L
H
V
HH
A
IN
(Note 4) (Note 4)
Standby
V
CC ±
0.3 V
XX
V
CC ±
0.3 V
H
X
High-Z
High-Z
High-Z
Output Disable
L
H
H
H
L/H
X
High-Z
High-Z
High-Z
Reset
X
X
X
L
L/H
X
High-Z
High-Z
High-Z
Sector Protect (Note 2)
L
H
L
V
ID
L/H
SA, A6 = L,
A1 = H, A0 = L
(Note 4)
X
X
Sector Unprotect
(Note 2)
LH
L
V
ID
(Note 3)
SA, A6 = H,
A1 = H, A0 = L
(Note 4)
X
X
Temporary Sector
Unprotect
XX
X
V
ID
(Note 3)
A
IN
(Note 4) (Note 4)
High-Z



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