FM25C160ULZEN

更新时间： 2024-01-25 04:49:02

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		存储内存集成电路光电二极管可编程只读存储器电动程控只读存储器电可擦编程只读存储器时钟
页数	文件大小	规格书
11页	104K
描述
SERIAL EEPROM\|2KX8\|CMOS\|DIP\|8PIN\|PLASTIC

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中文翻译

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技术参数
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FM25C160ULZEN 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Contact Manufacturer	零件包装代码：	DIP
包装说明：	DIP,	针数：	8
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.32.00.51	风险等级：	5.8
最大时钟频率 (fCLK)：	2.1 MHz	JESD-30 代码：	R-PDIP-T8
JESD-609代码：	e0	长度：	9.817 mm
内存密度：	16384 bit	内存集成电路类型：	EEPROM
内存宽度：	8	功能数量：	1
端子数量：	8	字数：	2048 words
字数代码：	2000	工作模式：	SYNCHRONOUS
最高工作温度：	70 °C	最低工作温度：
组织：	2KX8	封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP	封装形状：	RECTANGULAR
封装形式：	IN-LINE	并行/串行：	SERIAL
峰值回流温度（摄氏度）：	NOT SPECIFIED	认证状态：	Not Qualified
座面最大高度：	5.08 mm	串行总线类型：	SPI
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	4.5 V
标称供电电压 (Vsup)：	5 V	表面贴装：	NO
技术：	CMOS	温度等级：	COMMERCIAL
端子面层：	TIN LEAD	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	7.62 mm
最长写入周期时间 (tWC)：	10 ms	Base Number Matches：	1

FM25C160ULZEN 数据手册

SPI Modes 0 and 3 (00 and 11)

Functional Description (Continued)

FM25C160U supports both Mode 0 and Mode 3 of operations.

The difference between Mode 0 and Mode 3 is determined by the

state of the SCK clock signal when a SPI cycle starts (when /CS

is driven low) as well as when the SPI cycle ends (when /CS is

drivenhigh).UnderMode0ofoperation,theSCKsignalisheldlow

both at the start and at the end of a SPI cycle. Under Mode 1 of

operation, the SCK signal is held high both at the start and at the

end of a SPI cycle. However in both of these two modes, the input

data(SI)issampled(latchedin)attherisingedgeoftheSCKclock

signal and the output data (SO) is driven after the falling edge of

the SCK clock signal. See Figure 1 and Figure 2.

SPI communication

As mentioned before, serial communication with the EEPROM is

enabled when the /CS pin is held low and the /HOLD pin is held

high. Input data (Instruction Opcodes, Array addresses and Data)

on the SI pin is latched in on the rising edges of SCK clock signal,

startingfromthefirstrisingedgeafterthe/CSpingoeslow. During

the time the SI data is input into the EEPROM, the SO pin remains

in high impedance state. If the intended instruction is of read

nature (Array read and Status register read), then data from the

EEPROM is driven out actively on the SO pin from every falling

edge of the SCK after the last input data (SI) is latched in. During

the time the SO data is output from the EEPROM, the data on the

SI pin is ignored. Figure 2 illustrates the above. Refer Figure 1 for

timing information.

READ SEQUENCE (READ)

Reading the memory via the serial SPI link requires the following

sequence. The/CS pin is pulled low to select the EEPROM. The

READ opcode is transmitted on the SI pin followed by two bytes of

address, "High byte addr" (A15-A8) and "Low byte addr" (A7-A0).

After this is done, data on the SI pin becomes don't care. The data

(D7-D0)formtheaddressspecifiedisthenshiftedoutontheSOpin.

If only one byte is to be read, the /CS pin can be pulled back to the

high level. It is possible to continue the READ sequence as the byte

address is automatically incremented and data will continue to be

shifted out as clock pulses are continuously applied. When the end

ofmemoryarrayisreached(lastbytelocation),theaddresscounter

rolls over to the start of memory array (first byte location) allowing

the entire memory to be read in one continuous READ cycle. See

Figure 5. Note that only A10-A0 address bits are treated valid by

FM25C160U while bits A15-A11 are ignored.

HOLD function

An active communication with the EEPROM can be temporarily

suspended by bringing the /HOLD pin low when a EEPROM is

selected (/CS pin should be low) and a serial sequence with the

EEPROM is currently underway. To suspend the communication,

/HOLDpinmustbedrivenlowwhileSCKislow,otherwisetheHold

function will not be invoked until the next SCK high to low

transition. The EEPROM must remain selected during this se-

quence. TransitionsontheSCKandSIpinsareignoredduringthe

time the part is suspended and the SO pin will be in high

impedance state. Releasing the /HOLD pin back to high state will

allow the operation to resume from the point it was suspended.

/HOLD pin must be driven high while the SCK pin is low, otherwise

serial communication will not resume until the next SCK high to

low transition. Asserting a low on the /HOLD pin at any time will tri-

state the SO pin. Figure 3 illustrates Hold timing.

FIGURE 5. Read Sequence

Read

Opcode

High Byte

Addr

Low Byte

Addr

System Configuration

WhenmultipleSPIperipherals(fore.g.EEPROMs)arepresenton

the bus, the SI, SO and the SCK signals can be tied together.

Figure 4 illustrates a typical system configuration with respect to

/CS, SCK, SI and SO pins.

Data

(1)

Data

(2)

Data

(n)

READ STATUS REGISTER (RDSR):

The Read Status Register (RDSR) instruction provides read

access to the status register. As mentioned before, of the 8bits of

data, only the LSB 4bits are valid and they indicate Block Protec-

tion information (BP1 and BP0), Write Enable status (WEN) and

Busy/Ready status (/RDY) of the EEPROM. MSB 4bits of are

invalid (Don’t cares) Following is the format of RDSR data:

FIGURE 4. System Configuration

MASTER MCU

FM25Cxxx

DATA OUT (MOSI)

DATA IN (MISO)

SERIAL CLOCK (SPICK)

SCK

TABLE 3. Status Register Format

SS0

SS1

SS2

SS3

/CS

Bit

SPI

SCK

/CS

CHIP

SELECTION

BP1

BP0 WEN RDY

Bit3 (BP1) and Bit2 (BP0) together indicate Block write protection

previously set on the EEPROM. Refer Table 2.

Bit1 (WEN) indicates the Write enable status of the EEPROM.

This bit is a read-only bit and is read by executing RDSR

instruction. If this bit is “1” then the EEPROM is write enabled. If

this bit is “0” then the EEPROM is write disabled.

SCK

/CS

SCK

/CS

www.fairchildsemi.com

FM25C160U Rev. B

1...4 5 678 9 10 11

中文翻译

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与FM25C160ULZEN相关器件

型号	品牌	获取价格	描述	数据表
FM25C160ULZM8	ETC	获取价格	SPI Serial EEPROM
FM25C160ULZN	FAIRCHILD	获取价格	SERIAL EEPROM\|2KX8\|CMOS\|DIP\|8PIN\|PLASTIC
FM25C160ULZVM8	FAIRCHILD	获取价格	SERIAL EEPROM\|2KX8\|CMOS\|SOP\|8PIN\|PLASTIC
FM25C160ULZVN	FAIRCHILD	获取价格	SERIAL EEPROM\|2KX8\|CMOS\|DIP\|8PIN\|PLASTIC
FM25C160UM8	FAIRCHILD	获取价格	SERIAL EEPROM\|2KX8\|CMOS\|SOP\|8PIN\|PLASTIC
FM25C160UN	ETC	获取价格	SPI Serial EEPROM
FM25C160UV	FAIRCHILD	获取价格	16K-Bit SPI⑩ Interface Serial CMOS EEPROM
FM25C160UVM8	FAIRCHILD	获取价格	SERIAL EEPROM\|2KX8\|CMOS\|SOP\|8PIN\|PLASTIC
FM25C160UVM8X	FAIRCHILD	获取价格	EEPROM, 2KX8, Serial, CMOS, PDSO8, PLASTIC, SOIC-8
FM25C160UVN	FAIRCHILD	获取价格	SERIAL EEPROM\|2KX8\|CMOS\|DIP\|8PIN\|PLASTIC

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