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参数资料
| 型号： | CAT25020YE-T3 |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | PROM |
| 英文描述： | 256 X 8 SPI BUS SERIAL EEPROM, PDSO8 |
| 封装： | GREEN, MO-153, TSSOP-8 |
| 文件页数： | 12/17页 |
| 文件大小： | 152K |
| 代理商： | CAT25020YE-T3 |
CAT25010, CAT25020, CAT25040
Doc. No. MD-1006 Rev. U
4
2008 SCILLC. All rights reserved
Characteristics subject to change without notice
PIN DESCRIPTION
SI: The serial data input pin accepts op-codes,
addresses and data. In SPI modes (0,0) and (1,1)
input data is latched on the rising edge of the SCK
clock input.
SO: The serial data output pin is used to transfer data
out of the device. In SPI modes (0,0) and (1,1) data is
shifted out on the falling edge of the SCK clock.
SCK: The serial clock input pin accepts the clock
provided by the host and used for synchronizing
communication between host and CAT25010/20/40.
CS
: The chip select input pin is used to enable/disable
the CAT25010/20/40. When CS
is high, the SO output
is tri-stated (high impedance) and the device is in
Standby Mode (unless an internal write operation is in
progress). Every communication session between host
and CAT25010/20/40 must be preceded by a high to
low transition and concluded with a low to high
transition of the CS
input.
WP
: The write protect input pin will allow all write
operations to the device when held high. When WP
pin is tied low all write operations are inhibited.
HOLD
: The HOLD
input pin is used to pause trans–
mission between host and CAT25010/20/40, without
having to retransmit the entire sequence at a later
time. To pause, HOLD
must be taken low and to
resume it must be taken back high, with the SCK
input low during both transitions. When not used for
pausing, the HOLD
input should be tied to VCC,
either directly or through a resistor.
FUNCTIONAL DESCRIPTION
The
CAT25010/20/40
devices
support
the
Serial
Peripheral Interface (SPI) bus protocol, modes (0,0)
and (1,1). The device contains an 8-bit instruction
register. The instruction set and associated op-codes
are listed in Table 1.
Reading data stored in the CAT25010/20/40 is accom–
plished by simply providing the READ command and an
address. Writing to the CAT25010/20/40, in addition to
a WRITE command, address and data, also requires
enabling the device for writing by first setting certain bits
in a Status Register, as will be explained later.
After a high to low transition on the CS
input pin, the
CAT25010/20/40 will accept any one of the six
instruction op-codes listed in Table 1 and will ignore all
other possible 8-bit combinations. The communication
protocol follows the timing from Figure 1.
Table 1: Instruction Set
(1)
Instruction
Opcode
Operation
WREN
0000 0110
Enable Write Operations
WRDI
0000 0100
Disable Write Operations
RDSR
0000 0101
Read Status Register
WRSR
0000 0001
Write Status Register
READ
0000 X011
Read Data from Memory
WRITE
0000 X010
Write Data to Memory
Note:
(1) X = 0 for CAT25010, CAT25020. X = A8 for CAT25040
Figure 1. Synchronous Data Timing
Note: Dashed Line = mode (1, 1) - - - - - -
VALID IN
VIH
VIL
tCSS
VIH
VIL
VIH
VIL
VOH
VOL
HI-Z
tSU
tH
tWH
tWL
tV
tCS
tCSH
tHO
tDIS
HI-Z
CS
SCK
SI
SO
tRI
tFI
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT25020YGI | 制造商:Catalyst Semiconductor 功能描述: |
| CAT25020YI | 功能描述:电可擦除可编程只读存储器 (256x8) 2K 2.5-6.0 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 |
| CAT25020YI-G | 功能描述:电可擦除可编程只读存储器 (256x8) 2K 2.5-5.5 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 |
| CAT25020YI-GT3 | 功能描述:电可擦除可编程只读存储器 2K-Bit SPI Serial CMOS 电可擦除可编程只读存储器 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 |
| CAT25020Z | 功能描述:电可擦除可编程只读存储器 (256x8) 2K 2.5-6.0 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 |
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