- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375841 > FM24C04A-S (Electronic Theatre Controls, Inc.) 4Kb FRAM Serial 3V Memory PDF資料下載
參數(shù)資料
| 型號： | FM24C04A-S |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | DRAM |
| 英文描述： | 4Kb FRAM Serial 3V Memory |
| 中文描述： | 4Kb的鐵電串行3V的記憶 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大小： | 110K |
| 代理商： | FM24C04A-S |
FM24C04A
Overview
The FM24C04A is a serial FRAM memory. The
memory array is logically organized as 512 x 8 and is
accessed using an industry standard two-wire
interface. Functional operation of the FRAM is
similar to serial EEPROMs. The major difference
between the FM24C04A and a serial EEPROM with
the same pinout relates to its superior write
performance.
Rev. 2.0
July 2003
3 of 12
Memory Architecture
When accessing the FM24C04A, the user addresses
512 locations each with 8 data bits. These data bits
are shifted serially. The 512 addresses are accessed
using the two-wire protocol, which includes a slave
address (to distinguish other devices), a page address,
and a word address. The word address consists of 8-
bits that specify one of 256 addresses. The page
address is 1-bit and so there are 2 pages each of 256
locations. The complete address of 9-bits specifies
each byte address uniquely.
Most functions of the FM24C04A either are
controlled by the two-wire interface or are handled
automatically by on-board circuitry. The memory is
read or written at the speed of the two-wire bus.
Unlike an EEPROM, it is not necessary to poll the
device for a ready condition since writes occur at bus
speed. That is, by the time a new bus transaction can
be shifted into the part, a write operation will be
complete. This is explained in more detail in the
interface section below.
Users can expect several obvious system benefits
from the FM24C04A due to its fast write cycle and
high endurance as compared with EEPROM.
However there are less obvious benefits as well. For
example in a high noise environment, the fast-write
operation is less susceptible to corruption than an
EEPROM since it is completed quickly. By contrast
an EEPROM requiring milliseconds to write is
vulnerable to noise during much of the cycle.
Note that the FM24C04A contains no power
management circuits other than a simple internal
power-on reset. It is the user’s responsibility to ensure
that V
DD
is within data sheet tolerances to prevent
incorrect operation.
Two-wire Interface
The FM24C04A employs a bi-directional two-wire
bus protocol using few pins and little board space.
Figure 2 illustrates a typical system configuration
using the FM24C04A in a microcontroller-based
system. The industry standard two-wire bus is
familiar to many users but is described in this section.
By convention, any device that is sending data onto
the bus is the transmitter while the target device for
this data is the receiver. The device that is controlling
the bus is the master. The master is responsible for
generating the clock signal for all operations. Any
device on the bus that is being controlled is a slave.
The FM24C04A is always a slave device.
The bus protocol is controlled by transition states in
the SDA and SCL signals. There are four conditions:
Start, Stop, Data bit, and Acknowledge. Figure 3
illustrates the signal conditions that specify the four
states. Detailed timing diagrams are shown in the
electrical specifications.
Microcontroller
SDA
SCL
FM24C04A
A1 A2
SDA
SCL
FM24C64
A0 A1 A2
VDD
Rmin = 1.8 K
Rmax = tR/Cbus
Figure 2. Typical System Configuration
相關PDF資料 |
PDF描述 |
|---|---|
| FM24C05ULZ | 4K-Bit Standard 2-Wire Bus Interface Serial EEPROM |
| FM24C17U | 4K-Bit Standard 2-Wire Bus Interface Serial EEPROM |
| FM24C04UEM8 | I2C Serial EEPROM |
| FM24C04UEMT8 | I2C Serial EEPROM |
| FM24C04UEN | I2C Serial EEPROM |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| FM24C04A-STR | 功能描述:F-RAM 4K (512x8) 5V RoHS:否 存儲容量:512 Kbit 組織:64 K x 8 接口:SPI 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube 制造商:Cypress Semiconductor |
| FM24C04B | 制造商:RAMTRON 制造商全稱:RAMTRON 功能描述:4Kb Serial 5V F-RAM Memory |
| FM24C04B_13 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:4Kb Serial 5V F-RAM Memory |
| FM24C04B-G | 功能描述:F-RAM 4Kb Serial I2C 5V FRAM RoHS:否 存儲容量:512 Kbit 組織:64 K x 8 接口:SPI 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube 制造商:Cypress Semiconductor |
| FM24C04B-GTR | 功能描述:F-RAM 4Kb Serial I2C 5V FRAM RoHS:否 存儲容量:512 Kbit 組織:64 K x 8 接口:SPI 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube 制造商:Cypress Semiconductor |
發(fā)布緊急采購，3分鐘左右您將得到回復。