The PCA9549 provides eight bits of high speed TTL-compatible bus switching controlledby the I2C-bus. The low ON-state resistance of the switch allows connections to be madewith minimal propagation delay. Any individual A to B channel or combination of CHANNELscan be selected via the I2C-bus, determined by the contents of the programmable Controlregister. When the I2C-bus bit is HIGH (logic 1), the switch is on and data can flow fromPort A to Port B, or vice versa. When the I2C-bus bit is LOW (logic 0), the switch is open,creating a high-impedance state between the two ports, which stops the data flow.An active LOW reset input (RESET) allows the PCA9549 to recover from a situationwhere the I2C-bus is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-busstate machine and causes all the bits to be open, as does the internal power-on resetfunction.
上传时间： 2014-11-22
上传用户：xcy122677
The PCA9546A is a quad bidirectional translating switch controlled via the I2C-bus. TheSCL/SDA upstream pair fans out to four downstream pairs, or CHANNELs. Any individualSCx/SDx channel or combination of CHANNELs can be selected, determined by thecontents of the programmable control register.
上传时间： 2013-11-16
上传用户：cc1915
The PCA9547 is an octal bidirectional translating multiplexer controlled by the I2C-bus.The SCL/SDA upstream pair fans out to eight downstream pairs, or CHANNELs. Only oneSCx/SDx channel can be selected at a time, determined by the contents of theprogrammable control register. The device powers up with Channel 0 connected, allowingimmediate communication between the master and downstream devices on that channel.
上传时间： 2014-12-28
上传用户：270189020
The PCA9548A is an octal bidirectional translating switch controlled via the I2C-bus. TheSCL/SDA upstream pair fans out to eight downstream pairs, or CHANNELs. Any individualSCx/SDx channel or combination of CHANNELs can be selected, determined by thecontents of the programmable control register.An active LOW reset input allows the PCA9548A to recover from a situation where one ofthe downstream I2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets theI2C-bus state machine and causes all the CHANNELs to be deselected as does the internalPower-on reset function.
上传时间： 2013-10-13
上传用户：bakdesec
The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the CHANNELs are orientedin the same direction in the ISO7220 and in opposite directions in the ISO7221. These devices have a logic inputand output buffer separated by TI’s silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to4000 V. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, andprevent noise currents on a data bus or other circuits from entering the local ground and interfering with ordamaging sensitive circuitry.
上传时间： 2013-10-24
上传用户：hbsunhui
The Philips family of Multiplexers and Switches consists of bi-directional translating switches controlled via the I2C or SMBus to fan out an upstream SCL/SDA pair to 2, 4 or 8 downstream CHANNELs of SCx/SDx pairs. The Multiplexers allow only one downstream channel to be selected at a time, while the Switches allow any individual downstream channel or combination of downstream CHANNELs to be selected, depending on the content of the programmable control register. Once one or several CHANNELs have been selected, the device acts as a wire, allowing the master on the upstream channel to send commands to devices on all the active downstream CHANNELs, and devices on the active downstream CHANNELs to communicate with each other and the master. External pull-up resistors are used to pull each individual channel up to the desired voltage level. Combined interrupt output and hardware reset input are device options that are featured.
上传时间： 2013-10-11
上传用户：dianxin61
为了扩大监控范围，提高资源利用率，降低系统成本，提出了一种多通道视频切换的解决方案。首先从视频信号分离出行场信号，然后根据行场信号由DSP和FPGA产生控制信号，控制多路视频通道之间的切换，从而实现让一个视频处理器同时监控不同场景。实验结果表明，该方案可以在视频监控告警系统中稳定、可靠地实现视频通道的切换。 Abstract: To expand the scope of monitoring， improve resource utilization， reduce system cost， a multiple video CHANNELs signal switching method is pointed out in this paper. First， horizontal sync signal and field sync signal from the video signal are separated， then control signal according to the sync signal by DSP and FPGA is generated to control the switching between multiple video CHANNELs. Thus， it achieves to make a video processor to monitor different place. Experimental results show that the method can realize video channel switching reliably， and is applied in the video monitoring warning system successfully.
上传时间： 2013-11-09
上传用户：不懂夜的黑
The LPC2292/2294 microcontrollers are based on a 16/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, together with 256 kB of embedded high-speed flash memory. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at the maximum clock rate. For critical code size applications, the alternative 16-bit Thumb mode reduces code by more than 30 pct with minimal performance penalty. With their 144-pin package, low power consumption, various 32-bit timers, 8-channel 10-bit ADC, 2/4 (LPC2294) advanced CAN CHANNELs, PWM CHANNELs and up to nine external interrupt pins these microcontrollers are particularly suitable for automotive and industrial control applications as well as medical systems and fault-tolerant maintenance buses. The number of available fast GPIOs ranges from 76 (with external memory) through 112 (single-chip). With a wide range of additional serial communications interfaces, they are also suited for communication gateways and protocol converters as well as many other general-purpose applications. Remark: Throughout the data sheet, the term LPC2292/2294 will apply to devices with and without the /00 or /01 suffix. The suffixes /00 and /01 will be used to differentiate from other devices only when necessary.
上传时间： 2014-12-30
上传用户：aysyzxzm
The data plane of the reference design consists of a configurable multi-channel XBERT modulethat generates and checks high-speed serial data transmitted and received by the MGTs. Eachchannel in the XBERT module consists of two MGTs (MGTA and MGTB), which physicallyoccupy one MGT tile in the Virtex-4 FPGA. Each MGT has its own pattern checker, but bothMGTs in a channel share the same pattern generator. Each channel can load a differentpattern. The MGT serial rate depends on the reference clock frequency and the internal PMAdivider settings. The reference design can be scaled anywhere from one channel (two MGTs)to twelve CHANNELs (twenty-four MGTs).
上传时间： 2013-12-25
上传用户：jkhjkh1982
This example program shows how to configure and use the A/D Converter of the following microcontroller: STMicroelectronics ST10F166 After configuring the A/D, the program reads the A/D result and outputs the converted value using the serial port. To run this program... Build the project (Project Menu, Build Target) Start the debugger (Debug Menu, Start/Stop Debug Session) View the Serial Window (View Menu, Serial Window #1) View the A/D converter peripheral (Peripheral Menu, A/D Converter) Run the program (Debug Menu, Go) A debug script (debug.ini) creates buttons that set different analog values in A/D CHANNELs. As the program runs, you will see the A/D input and output change. Other buttons create signals that generate sine wave or sawtooth patterns as analog inputs. µ Vision3 users may enable the built-in Logic Analyzer to view, measure and compare these input signals graphically.
标签： microcontroll Converter configure following
上传时间： 2014-12-01
上传用户：独孤求源
