參數(shù)資料
型號(hào)： SC16IS741IPW
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 微控制器/微處理器
英文描述： Single UART with I2C-bus-SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
中文描述： 1 CHANNEL(S), 5M bps, I2C BUS CONTROLLER, PDSO16
封裝： 4.40 MM, PLASTIC, MO-153, SOT403-1, TSSOP-16
文件頁(yè)數(shù)： 33/52頁(yè)
文件大?。?/td> 382K
代理商： SC16IS741IPW
SC16IS741_1
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 01 — 29 April 2010
33 of 52
NXP Semiconductors
SC16IS741
Single UART with I
2
C-bus/SPI interface, 64-byte FIFOs, IrDA SIR
There are two exceptions to the ‘a(chǎn)cknowledge after every byte’ rule. The first occurs when
a master is a receiver: it must signal an end of data to the transmitter by
not
signalling an
acknowledge on the last byte that has been clocked out of the slave. The acknowledge
related clock, generated by the master should still take place, but the SDA line will not be
pulled down. In order to indicate that this is an active and intentional lack of
acknowledgement, we shall term this special condition as a ‘negative acknowledge’.
The second exception is that a slave will send a negative acknowledge when it can no
longer accept additional data bytes. This occurs after an attempted transfer that cannot be
accepted.
10.2 Addressing and transfer formats
Each device on the bus has its own unique address. Before any data is transmitted on the
bus, the master transmits on the bus the address of the slave to be accessed for this
transaction. A well-behaved slave with a matching address, if it exists on the network,
should of course acknowledge the master's addressing. The addressing is done by the
first byte transmitted by the master after the START condition.
An address on the network is seven bits long, appearing as the most significant bits of the
address byte. The last bit is a direction (R/W) bit. A ‘0’ indicates that the master is
transmitting (write) and a ‘1’ indicates that the master requests data (read). A complete
data transfer, comprised of an address byte indicating a ‘write’ and two data bytes is
shown in
Figure 16
.
When an address is sent, each device in the system compares the first seven bits after
the START with its own address. If there is a match, the device will consider itself
addressed by the master, and will send an acknowledge. The device could also determine
if in this transaction it is assigned the role of a slave receiver or slave transmitter,
depending on the R/W bit.
Each node of the I
2
C-bus network has a unique seven-bit address. The address of a
microcontroller is of course fully programmable, while peripheral devices usually have
fixed and programmable address portions.
When the master is communicating with one device only, data transfers follow the format
of
Figure 16
, where the R/W bit could indicate either direction. After completing the
transfer and issuing a STOP condition, if a master would like to address some other
device on the network, it could start another transaction by issuing a new START.
Fig 16. A complete data transfer
S
P
SDA
SCL
0 to 6
7
8
ACK
002aab046
START
condition
STOP
condition
address
R/W
0 to 6
7
8
data
ACK
0 to 6
7
8
data
ACK
相關(guān)PDF資料
PDF描述
SC16IS752IBS Dual UART with I2C-bus-SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
SC16IS752IPW Dual UART with I2C-bus-SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
SC16IS762IBS Dual UART with I2C-bus-SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
SC16IS762IPW Dual UART with I2C-bus-SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
SC5R5153Z 2.7V/2.0F Primary or back-up power supply for video, audio
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC16IS741IPW,112 功能描述:UART 接口集成電路 IC UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16IS741IPW,118 功能描述:UART 接口集成電路 SINGLE UART W/ 12C-BUS/SPI INTERFC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16IS741IPW,128 功能描述:UART 接口集成電路 IC UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
SC16IS74Q900 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Single UART with I2C-bus/SPI interface, 64 bytes of transmit and receive FIFOs
SC16IS750 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Single UART with I2C-bus/SPI interface, 64 bytes of transmit and receive FIFOs, IrDA SIR built-in support
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*