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參數(shù)資料
型號(hào): PCF8570
廠商: NXP Semiconductors N.V.
英文描述: 256 x 8-bit static low-voltage RAM with I2C-bus interface
中文描述: 256 × 8位靜態(tài)低電壓內(nèi)存具有I2C總線接口
文件頁(yè)數(shù): 6/20頁(yè)
文件大?。?/td> 140K
代理商: PCF8570
1999 Jan 06
6
Philips Semiconductors
Product specification
256
×
8-bit static low-voltage RAM with
I
2
C-bus interface
PCF8570
8.3
System configuration
A device generating a message is a ‘transmitter’, a device receiving a message is the ‘receiver’. The device that controls
the message is the ‘master’ and the devices which are controlled by the master are the ‘slaves’.
Fig.5 System configuration.
MBA605
MASTER
TRANSMITTER /
RECEIVER
SLAVE
RECEIVER
SLAVE
TRANSMITTER /
RECEIVER
MASTER
TRANSMITTER
MASTER
TRANSMITTER /
RECEIVER
SDA
SCL
8.4
Acknowledge
The number of data bytes transferred between the start
and stop conditions from transmitter to receiver is
unlimited. Each byte of eight bits is followed by an
acknowledge bit. The acknowledge bit is a HIGH level
signal put on the bus by the transmitter during which time
the master generates an extra acknowledge related clock
pulse. A slave receiver which is addressed must generate
an acknowledge after the reception of each byte. Also a
master receiver must generate an acknowledge after the
reception of each byte that has been clocked out of the
slave transmitter.
The device that acknowledges must pull down the SDA
line during the acknowledge clock pulse, so that the SDA
line is stable LOW during the HIGH period of the
acknowledge related clock pulse (set-up and hold times
must be taken into consideration). A master receiver must
signal an end of data to the transmitter by not generating
an acknowledge on the last byte that has been clocked out
of the slave. In this event the transmitter must leave the
data line HIGH to enable the master to generate a stop
condition.
Fig.6 Acknowledgement on the I
2
C-bus.
handbook, full pagewidth
MBA606 - 1
START
condition
S
SCL FROM
MASTER
DATA OUTPUT
BY TRANSMITTER
DATA OUTPUT
BY RECEIVER
clock pulse for
acknowledgement
1
2
8
9
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCF8570P 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:256 x 8-bit static low-voltage RAM with I2C-bus interface
PCF8570P/F5 制造商:NXP Semiconductors 功能描述:3400ns Bulk 制造商:NXP Semiconductors 功能描述:IC SRAM CMOS 2K 8570 DIP8
PCF8570P/F5,112 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 RAM 256X8 W/I2C LOW PWR -40+85 RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪問時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray
PCF8570P/F5 制造商:NXP Semiconductors 功能描述:IC SRAM CMOS 2K 8570 DIP8
PCF8570P/F5112 制造商:NXP Semiconductors 功能描述:IC SRAM 1KBIT I2C DIP-8 制造商:NXP Semiconductors 功能描述:IC SRAM 2K 8570 DIP8
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