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參數(shù)資料
| 型號(hào)： | LE28FV4001T |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 4MEG (52488 x 8 Bits) Flash Memory |
| 中文描述： | 4MEG（52488 × 8位）閃存 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大小： | 230K |
| 代理商： | LE28FV4001T |
Pin Functions
Function Logic
Command Settings
Notes on command settings
1. X = high or low
2. The sector address is taken from A8 to A18, the sector size is 256 bytes, and A0 to A7 can be high or low during a sector erase operation.
3. The program address is taken from A0 to A18.
4. Data is displayed in hexadecimal.
5. SDP refers to the software data protect function, which uses a 7-byte read cycle sequence.
Y = Can be executed even when the software data protect function is enabled.
N = Cannot be executed when the software data protect function is enabled.
6. Figures 9 and 10 show the operation of the software data protect function using 7-byte read cycle sequences.
7. When an address of 0000 is specified, the manufacturer code, BF, is output, and when the address is 0001, the device code, 04, is output.
No. 5468-3/14
LE28FV4001M, T, R-20/25
Symbol
Pin
Functions
A18 to A0
Address input
Supply the memory address to these pins.
The address is latched internally during a write cycle.
These pins output data during a read cycle and input data during a write cycle.
Data is latched internally during a write cycle.
Outputs go to the high-impedance state when either OE or CE is high.
DQ7 to DQ0
Data input and output
CE
Chip enable
The device is active when CE is low.
When CE is high, the device becomes unselected and goes to the standby state.
OE
Output enable
Makes the data output buffers active.
OE is a low-active input.
WE
Write enable
Makes the write operation active.
WE is an active-low input.
V
DD
V
SS
N.C.
Power supply
Apply 3.3 V ±0.3 V to this pin.
Ground
No connection
These pins are not connected to the chip internally.
Mode
CE
OE
WE
A18 to A0
DQ7 to DQ0
Read
V
IL
V
IL
V
IH
X
V
IL
V
IH
X
V
IH
V
IL
X
A
IN
A
IN
X
D
OUT
D
IN
High-Z
Write
Standby or write inhibit
Write inhibit
V
IL
X
X
X
High-Z/D
OUT
High-Z/D
OUT
X
V
IH
X
A18 to A10 = V
IL
, A8 to A1 = V
IL
,
A9 = 12 V, A0 = V
IL
Manufacturer code (BF)
Product identification
V
IL
V
IL
V
IH
A18 to A10 = V
IL
, A8 to A1 = V
IL
,
A9 = 12 V, A0 = V
IH
Device code (04)
Command
Request
Setup command cycle
Execute command cycle
SDP
cycles
Operation
Address
Data
Operation
Address
Data
Sector erase
2
Write
X
20H
Write
Sector address
D0H
N
Byte program
2
Write
X
10H
Write
Program address
Program data
N
Reset
1
Write
X
FFH
Y
Read ID
3
Write
X
90H
Read
(7)
(7)
Y
Software data unprotect
7
See Figure 9.
Software data protect
7
See Figure 10.
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