LH28F004SUB-Z9 查看數據表（PDF） - Sharp Electronics
零件编号
产品描述 (功能)
生产厂家
LH28F004SUB-Z9 Datasheet PDF : 31 Pages
| |||
LH28F004SU-Z9
4M (512K × 8) Flash Memory
MEMORY MAP
7FFFFH
7C000H
7BFFFH
78000H
77FFFH
74000H
73FFFH
70000H
6FFFFH
6C000H
6BFFFH
68000H
67FFFH
64000H
63FFFH
60000H
5FFFFH
5C000H
5BFFFH
58000H
57FFFH
54000H
53FFFH
50000H
4FFFFH
4C000H
4BFFFH
48000H
47FFFH
44000H
43FFFH
40000H
3FFFFH
3C000H
3BFFFH
38000H
37FFFH
34000H
33FFFH
30000H
2FFFFH
2C000H
2BFFFH
28000H
27FFFH
24000H
23FFFH
20000H
1FFFFH
1C000H
1BFFFH
18000H
17FFFH
14000H
13FFFH
10000H
0FFFFH
0C000H
0BFFFH
08000H
07FFFH
04000H
03FFFH
00000H
16KB BLOCK
31
16KB BLOCK
30
16KB BLOCK
29
16KB BLOCK
28
16KB BLOCK
27
16KB BLOCK
26
16KB BLOCK
25
16KB BLOCK
24
16KB BLOCK
23
16KB BLOCK
22
16KB BLOCK
21
16KB BLOCK
20
16KB BLOCK
19
16KB BLOCK
18
16KB BLOCK
17
16KB BLOCK
16
16KB BLOCK
15
16KB BLOCK
14
16KB BLOCK
13
16KB BLOCK
12
16KB BLOCK
11
16KB BLOCK
10
16KB BLOCK
9
16KB BLOCK
8
16KB BLOCK
7
16KB BLOCK
6
16KB BLOCK
5
16KB BLOCK
4
16KB BLOCK
3
16KB BLOCK
2
16KB BLOCK
1
16KB BLOCK
0
28F004SU-Z9-3
Figure 3. Memory Map (Byte-Wide Mode)
The LH28F004SU is available in a 42-pin, 0.67 mm
thick × 8 mm × 8 mm CSP package. This form factor
and pinout allow for very high board layout densities.
A Command User Interface (CUI) serves as the
system interface between the microprocessor or micro-
controller and the internal memory operation.
Internal Algorithm Automation allows Byte Writes and
Block Erase operations to be executed using a Two-
Write command sequence to the CUI in the same way
as the LH28F008SA 8M Flash Memory.
A Superset of commands have been added to the
basic LH28F008SA command-set to achieve higher
write performance and provide additional capabilities.
These new commands and features include:
• Software Locking of Memory Blocks
• Memory Protection Set/Reset Capability
• Two-Byte Serial Writes in 8-bit Systems
• Erase All Unlocked Blocks
Writing of memory data is performed typically within
20 µs. A Block Erase operation erases one of the 32
blocks in typically 0.8 seconds independent of the other
blocks.
LH28F004SU allows to erase all unlocked blocks. It
is desirable in case of which you have to implement
Erase operation maximum 32 times.
LH28F004SU enables Two-Byte serial Write which
is operated by three times command input. Writing of
memory data is performed typically within 30 µs per
two-byte. This feature can improve system write perfor-
mance by up to typically 15 µs per byte.
All operations are started by a sequence of Write
commands to the device. Status Register (described in
detail later) and a RY »/BY » output pin provide informa-
tion on the progress of the requested operation.
Same as the LF28F008SA, LH28F004SU requires
an operation to complete before the next operation can
be requested, also it allows to suspend block erase to
read data from any other block, and allow to resume
erase operation.
The LH28F004SU provides user-selectable block
locking to protect code or data such as Device Drivers,
PCMCIA card information, ROM-Executable OS or
Application Code. Each block has an associated non-
volatile lock-bit which determines the lock status of the
block. In addition, the LH28F004SU has a software con-
trolled master Write Protect circuit which prevents any
modifications to memory blocks whose lock-bits are set.
When the device power-up or RP » turns High, Write
Protect Set/Confirm command must be written. Other-
wise, all lock bits in the device remain being locked,
can’t perform the Write to each block and single block
Erase.Write Protect Set/Confirm command must be writ-
ten to reflect the actual lock status . However, when the
device power-on or RP » turns High, Erase All Unlocked
Blocks can be used. If used, Erase is performed with
reflecting actual lock status, and after that Write and
Block Erase can be used.
4
Share Link: 