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參數(shù)資料
| 型號： | 25AA020A |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 2K SPI Bus Serial EEPROM |
| 中文描述： | 2K SPI總線串行EEPROM |
| 文件頁數(shù)： | 13/28頁 |
| 文件大?。?/td> | 362K |
| 代理商： | 25AA020A |
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2006 Microchip Technology Inc.
Preliminary
DS21833C-page 13
25AA020A/25LC020A
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
3.1
Chip Select (CS)
A low level on this pin selects the device. A high level
deselects the device and forces it into Standby mode.
However, a programming cycle which is already
initiated or in progress will be completed, regardless of
the CS input signal. If CS is brought high during a
program cycle, the device will go into Standby mode as
soon as the programming cycle is complete. When the
device is deselected, SO goes to the high-impedance
state, allowing multiple parts to share the same SPI
bus. A low to high transition on CS after a valid write
sequence initiates an internal write cycle. After power-
up, a low level on CS is required prior to any sequence
being initiated.
3.2
Serial Output (SO)
The SO pin is used to transfer data out of the
25XX020A. During a read cycle, data is shifted out on
this pin after the falling edge of the serial clock.
3.3
Write-Protect (WP)
The WP pin is a hardware write-protect input pin.
When it is low, all writes to the array or STATUS reg-
ister are disabled, but any other operations function
normally. When WP is high, all functions, including
nonvolatile writes operate normally. At any time, when
WP is low, the write enable reset latch will be reset
and programming will be inhibited. However, if a write
cycle is already in progress, WP going low will not
change or disable the write cycle. See Table 2-4 for
the Write-Protect Functionality Matrix.
3.4
Serial Input (SI)
The SI pin is used to transfer data into the device. It
receives instructions, addresses and data. Data is
latched on the rising edge of the serial clock.
3.5
Serial Clock (SCK)
The SCK is used to synchronize the communication
between a master and the 25XX020A. Instructions,
addresses or data present on the SI pin are latched on
the rising edge of the clock input, while data on the SO
pin is updated after the falling edge of the clock input.
3.6
Hold (HOLD)
The HOLD pin is used to suspend transmission to the
25XX020A while in the middle of a serial sequence
without having to retransmit the entire sequence again.
It must be held high any time this function is not being
used. Once the device is selected and a serial
sequence is underway, the HOLD pin may be pulled
low to pause further serial communication without
resetting the serial sequence. The HOLD pin must be
brought low while SCK is low, otherwise the HOLD
function will not be invoked until the next SCK high-to-
low transition. The 25XX020A must remain selected
during this sequence. The SI, SCK and SO pins are in
a high-impedance state during the time the device is
paused and transitions on these pins will be ignored. To
resume serial communication, HOLD must be brought
high while the SCK pin is low, otherwise serial
communication will not resume. Lowering the HOLD
line at any time will tri-state the SO line.
Name
PDIP, SOIC,
MSOP,
TSSOP,
DFN
Rotated
TSSOP
SOT-
23
Function
CS
SO
WP
V
SS
SI
SCK
HOLD
V
CC
1
2
3
4
5
6
7
8
3
4
5
6
7
8
1
2
5
4
—
2
3
1
—
6
Chip Select Input
Serial Data Output
Write-Protect Pin
Ground
Serial Data Input
Serial Clock Input
Hold Input
Supply Voltage
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 25AA040A | 4K SPI Bus Serial EEPROM |
| 25AA080 | 8K/16K 1.8V SPI Bus Serial EEPROM |
| 25AA160 | 8K/16K 1.8V SPI Bus Serial EEPROM |
| 25AA1024 | 1 Mbit SPI Bus Serial EEPROM |
| 25AA128 | 128K SPI Bus Serial EEPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 25AA020A/S16K | 功能描述:電可擦除可編程只讀存儲器 2K, 256 X 8, 1.8V SER EE, DIE in WAFFLE PK RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 25AA020A/W16K | 功能描述:電可擦除可編程只讀存儲器 2K, 256 X 8, 1.8V SER EE, WAFER RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 25AA020A/WF16K | 功能描述:電可擦除可編程只讀存儲器 2K, 256 X 8, 1.8V SER EE, WAFER on FRAME RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 25AA020A_12 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2K SPI Bus Serial EEPROM |
| 25AA020A-E/MC | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2K SPI Bus Serial EEPROM |
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