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参数资料
| 型号： | 25AA160-I/SN |
| 元件分类： | PROM |
| 英文描述： | 2K X 8 SPI BUS SERIAL EEPROM, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, MS-012, SOIC-8 |
| 文件页数： | 19/22页 |
| 文件大小： | 335K |
| 代理商： | 25AA160-I/SN |
25AA160/25LC160/25C160
DS21231D-page 6
2004 Microchip Technology Inc.
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
2.1
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 initi-
ated 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.
2.2
Serial Output (SO)
The SO pin is used to transfer data out of the 25XX160.
During a read cycle, data is shifted out on this pin after
the falling edge of the serial clock.
2.3
Write-Protect (WP)
This pin is used in conjunction with the WPEN bit in the
Status register to prohibit writes to the nonvolatile bits
in the Status register. When WP is low and WPEN is
high, writing to the nonvolatile bits in the Status register
is disabled. All other operations function normally.
When WP is high, all functions, including writes to the
nonvolatile bits in the Status register operate normally.
If the WPEN bit is set, WP low during a Status register
write sequence will disable writing to the Status
register. If an internal write cycle has already begun,
WP going low will have no effect on the write.
The WP pin function is blocked when the WPEN bit in
the Status register is low. This allows the user to install
the 25XX160 in a system with WP pin grounded and
still be able to write to the Status register. The WP pin
functions will be enabled when the WPEN bit is set
high.
2.4
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.
2.5
Serial Clock (SCK)
The SCK is used to synchronize the communication
between a master and the 25XX160. 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.
2.6
Hold (HOLD)
The HOLD pin is used to suspend transmission to the
25XX160 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 25XX160 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 commu-
nication will not resume. Lowering the HOLD line at any
time will tri-state the SO line.
Name
PDIP
SOIC
Description
CS
11
Chip Select Input
SO
2
Serial Data Output
WP
3
Write-Protect Pin
VSS
4
Ground
SI
5
Serial Data Input
SCK
6
Serial Clock Input
HOLD
7
Hold Input
Vcc
8
Supply Voltage
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 25AA160T-/P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:16K SPI Bus Serial EEPROM |
| 25AA160T/SN | 功能描述:电可擦除可编程只读存储器 2kx8 - 1.8V RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| 25AA160T-/SN | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:16K SPI Bus Serial EEPROM |
| 25AA160T-E/P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:16K SPI Bus Serial EEPROM |
| 25AA160T-E/SN | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:16K SPI Bus Serial EEPROM |
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