Uniwill N356 Modem Driver
Top quality. Compatibility guaranteed. Original Manufacturer Product Number: UB, SS1P1, SS1P1, UC, synthesis can be directed towards modem, well- accepted VHDL or . Colllrol unill. Colllrol unil 2. 2n. 2n .. (ESRA), , pp IEC . Free download, review of Uniwill N Modem Driver (ECS Computer Int'l Corp.). Through its extensive manufacturing capabilities and talented research.
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Uniwill N356 Modem Driver
According to another aspect of the present invention, the Uniwill N356 Modem controller is adapted to configure the UART to operate in a sample Uniwill N356 Modem wherein the UART receiver repetitively samples a signal state of the common data line at a sample rate that is a multiple of the programmable baud rate so as to collect sample data bytes.
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The modem controller is further adapted to read the sample data bytes and to detect error conditions related to the SIM based Uniwill N356 Modem the sample data bytes collected by the UART receiver. According to yet another aspect of the present invention, the circuit includes a reset circuit adapted to derive and selectively assert and de-assert the SIM reset signal in response to a SIM reset control signal from the modem controller.
The circuit also comprises a first switch control circuit adapted to derive the first switch control signal in response to a first control signal from Uniwill N356 Modem modem controller, whereby the modem Uniwill N356 Modem can selectively apply power to and remove power from the SIM. According to yet another aspect of the present invention, the circuit comprises a second power switch connected between a power supply rail of the WCD used to supply power to the SIM and a power input of the SIM.
The second power switch is adapted to selectively connect and disconnect the WCD power supply rail to the SIM power input in response to a second switch control signal. The circuit further comprises a second Uniwill N356 Modem control circuit adapted to derive the second switch control signal in response to a second control signal from the modem controller, whereby the modem controller can selectively apply power to and remove power from the SIM.
According to an even further aspect of the present invention, the circuit comprises an interval timer adapted to generate an interrupt to the modem controller after a programmable delay time based on a clock received by the interval timer and in accordance with a delay control signal from the modem controller. In another embodiment, the present invention comprises a method of interfacing the modem to the SIM.
The method further comprises repetitively sampling a state of the common line during an error signal window occurring after the byte has been transmitted, thereby collecting sample bytes indicative Uniwill N356 Modem whether an error related to Uniwill N356 Modem SIM has occurred.
The method further comprises determining whether the error related to the SIM has occurred based on the sample bytes, and re-transmitting the byte to the SIM when it is determined that the error related to Uniwill N356 Modem SIM has occurred. The interface includes a plurality of interface circuits constructed on a single integrated circuit chip, thereby reducing part count, size, and power requirements Uniwill N356 Modem the WCD. The interface re-uses circuits and capabilities of a modem of the WCD, including a modem controller, instead of adding a dedicated controller to implement and control the interface, thereby further reducing the part count of and conserving power in the WCD.
The interface includes a Bus interface circuit connected between Uniwill N356 Modem modem and the SIM, thereby enabling the modem and the SIM to share a common data line used for communicating data between the two devices.
The interface can repetitively sample the common data line in a sample mode to detect error conditions associated with the SIM. Alternatively the interface can sample the common data line in a byte mode, thereby collecting data bytes or characters communicated on the common data line. The interface can selectively apply power to and remove power from the Bus interface circuit, thereby conserving power in the WCD and protecting the SIM and modem when the SIM is not in use.
The interface can selectively apply power to and remove power from the SIM, Uniwill N356 Modem further conserving power in the WCD. WCD can be coupled to a computer by a datalink Signal processing module includes a Radio Frequency RF receive Rx and transmit Tx sectiona modemand a conventional SIM adapted to be installed in for example, plugged into and removed for example, un-plugged from signal processing module Modem also includes a modem controller for controlling the modem and SIMas will be described in detail below.
Conventional SIM includes a small computer system having a controller and a memory. The present invention can be used with a SIM compliant with the following standards: However, the present invention is not limited to Uniwill N356 Modem with such a SIM, and can thus be used with a SIM that does not strictly comply with such standards. A brief overview of the operation of WCD is now provided for completeness. In a receive direction, antenna of WCD receives an RF signal transmitted from another wireless communication device not shown Uniwill N356 Modem, such as a base station, mobile device, and so on.
Power switch can selectively apply power to and remove the power from SIM in response to a SIM power control signal provided to switch over a line An exemplary switching circuit for power switch includes a FET transistor having a source-drain current path connected between power supply rail and the power supply input of SIMand a gate electrode connected to line Power supply rails and can be the same or different power Uniwill N356 Modem rails.
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Power switch can include a switching circuit similar to that of switchdescribed above. Such open-drain outputs are known in the art. In the present invention, the modem transmit and receive ports TX and RX Uniwill N356 Modem have a dedicated function.
The modem transmit port TX includes a drive circuit to actively drive a line attached thereto to either a high or low voltage level corresponding to a logic high "1" or a logic low "0" binary Uniwill N356 Modem, for example. The modem receive port RX can sense that is, sample a voltage level on common line and translate the level to either a logic high "1" or a logic low "0" binary value.
As a result, damage to either modem or SIM may occur. Each of the transistors and is configured as an open-collector inverter. For simplicity, the two inverter stages corresponding to transistors and are depicted as Uniwill N356 Modem identical in FIG. However, the inverter stages need not be identical.
In addition, the use of two inverter stages is not necessary. Associated with data bus are an address bus Uniwill N356 Modem data read and write signals not shownas would be apparent to one of ordinary skill in the art. Modem controller is preferably a bit controller such as a bit Reduced Instruction Set Controllerand correspondingly, data bus is preferably a bit bus.