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AT29BV020 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AT29BV020
기능 2 Megabit 256K x 8 Single 2.7-volt Battery-Voltage CMOS Flash Memory
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AT29BV020 데이터시트, 핀배열, 회로
AT29BV020
Features
Single Supply Voltage, Range 2.7V to 3.6V
Single Supply for Read and Write
Software Protected Programming
Fast Read Access Time - 250 ns
•• Low Power Dissipation
15 mA Active Current
20 µA CMOS Standby Current
Sector Program Operation
Single Cycle Reprogram (Erase and Program)
1024 Sectors (256 bytes/sector)
Internal Address and Data Latches for 256-Bytes
Two 8 KB Boot Blocks with Lockout
Fast Sector Program Cycle Time - 20 ms Max.
Internal Program Control and Timer
DATA Polling for End of Program Detection
Typical Endurance > 10,000 Cycles
CMOS and TTL Compatible Inputs and Outputs
•• Commercial and Industrial Temperature Ranges
Description
The AT29BV020 is a 2.7-volt-only in-system Flash Programmable and Erasable Read
Only Memory (PEROM). Its 2 megabits of memory is organized as 262,144 words by
8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS EEPROM technology,
the device offers access times up to 250 ns, and a low 54 mW power dissipation.
When the device is deselected, the CMOS standby current is less than 20 µA. The
device endurance is such that any sector can typically be written to in excess of
10,000 times. The programming algorithm is compatible with other devices in Atmel’s
Low Voltage Flash family of products.
(continued)
Pin Configurations
Pin Name
A0 - A17
CE
OE
WE
I/O0 - I/O7
NC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
2 Megabit
(256K x 8)
Single 2.7-volt
Battery-Voltage
CMOS Flash
Memory
AT29BV020
TSOP Top View
Type 1
PLCC Top View
0402B
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AT29BV020 pdf, 반도체, 판매, 대치품
Device Operation (Continued)
BOOT BLOCK LOCKOUT DETECTION: A software
method is available to determine whether programming of
either boot block section is locked out. See Software Prod-
uct Identification Entry and Exit sections. When the device
is in the software product identification mode, a read from
location 00002H will show if programming the lower ad-
dress boot block is locked out while reading location
FFFF2H will do so for the upper boot block. If the data is
FE, the corresponding block can be programmed; if the
data is FF, the program lockout feature has been activated
and the corresponding block cannot be programmed. The
software product identification exit mode should be used
to return to standard operation.
DC and AC Operating Range
AT29BV020-25
AT29BV020-35
Operating
Temperature (Case)
VCC Power Supply (1)
Com.
Ind.
0°C - 70°C
-40°C - 85°C
2.7V to 3.6V
0°C - 70°C
-40°C - 85°C
2.7V to 3.6V
1. After power is applied and VCC is at the minimum specified data sheet value, the system should wait 20 ms before an
operational mode is started.
Operating Modes
Mode
Read
Program (2)
Standby/Write Inhibit
Program Inhibit
Program Inhibit
Output Disable
Product Identification
Hardware
Software (5)
CE OE WE
VIL VIL VIH
VIL VIH VIL
VIH X (1) X
X X VIH
X VIL X
X VIH X
Ai I/O
Ai DOUT
Ai DIN
X High Z
High Z
VIL
VIL
VIH
A1 - A17 = VIL, A9 = VH (3),
A0 = VIL
A1 - A17 = VIL, A9 = VH (3),
A0 = VIH
Manufacturer Code (4)
Device Code (4)
A0 = VIL, A1 - A17 = VIL
Manufacturer Code (4)
A0 = VIH, A1 - A17 = VIL
Device Code (4)
Notes: 1. X can be VIL or VIH.
2. Refer to AC Programming Waveforms.
3. VH = 12.0V ± 0.5V.
DC Characteristics
4. Manufacturer Code is 1F. The Device Code is BA.
5. See details under Software Product Identification Entry/Exit.
Symbol
ILI
ILO
Parameter
Input Load Current
Output Leakage Current
ISB1 VCC Standby Current CMOS
ISB2 VCC Standby Current TTL
ICC VCC Active Current
VIL Input Low Voltage
VIH Input High Voltage
VOL Output Low Voltage
VOH Output High Voltage
Condition
VIN = 0V to VCC
VI/O = 0V to VCC
CE = VCC - 0.3V to VCC
Com.
Ind.
CE = 2.0V to VCC
f = 5 MHz; IOUT = 0 mA; VCC = 3.6V
IOL = 1.6 mA; VCC = 3.0V
IOH = -100 µA; VCC = 3.0V
Min
2.0
2.4
Max
1
1
20
50
1
15
0.6
0.45
Units
µA
µA
µA
µA
mA
mA
V
V
V
V
4-16 AT29BV020

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AT29BV020 전자부품, 판매, 대치품
Program Cycle Characteristics
Symbol
tWC
tAS
tAH
tDS
tDH
tWP
tBLC
tWPH
Parameter
Write Cycle Time
Address Set-up Time
Address Hold Time
Data Set-up Time
Data Hold Time
Write Pulse Width
Byte Load Cycle Time
Write Pulse Width High
Min
10
100
100
10
200
200
Software Protected Program Waveform
AT29BV020
Max Units
20 ms
ns
ns
ns
ns
ns
150 µs
ns
Notes: 1. OE must be high when WE and CE are both low.
2. A8 through A17 must specify the sector address
during each high to low transition of WE (or CE)
after the software code has been entered.
Programming Algorithm (1)
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA A0
TO
ADDRESS 5555
WRITES ENABLED
LOAD DATA
TO (3)
SECTOR (256 BYTES)
ENTER DATA
(2)
PROTECT STATE
3. Data in bytes not loaded within a sector being programmed
may be altered by the program operation; therefore, all
bytes within a sector must be loaded.
Notes for software program code:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. Data Protect state will be re-activated at end of program cycle.
3. 256-bytes of data MUST BE loaded.
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부품번호상세설명 및 기능제조사
AT29BV020

2 Megabit 256K x 8 Single 2.7-volt Battery-Voltage CMOS Flash Memory

ATMEL Corporation
ATMEL Corporation
AT29BV020-25

2 Megabit 256K x 8 Single 2.7-volt Battery-Voltage CMOS Flash Memory

ATMEL Corporation
ATMEL Corporation

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