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GS9092A Datasheet(PDF) 53 Page - Gennum Corporation |
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GS9092A Datasheet(HTML) 53 Page - Gennum Corporation |
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53 / 63 page  GS9092A GenLINX® III 270Mb/s Serializer for SDI and DVB-ASI Data Sheet 34715 - 4 May 2010 53 of 63 3.13 GSPI Host Interface The GSPI, or Gennum Serial Peripheral Interface, is a 4-wire interface provided to allow the host to enable additional features of the GS9092A and/or to provide additional status information through configuration registers in the device. The GSPI comprises a serial data input signal SDIN, serial data output signal SDOUT, an active low chip select CS, and a burst clock SCLK. Because these pins are shared with the JTAG interface port, an additional control signal pin JTAG/HOST is provided. When JTAG/HOST is LOW, the GSPI interface is enabled. When operating in GSPI mode, the SCLK, SDIN, and CS signals are provided by the application interface. The SDOUT pin is a non-clocked loop-through of SDIN and may be connected to the SDIN of another device, allowing multiple devices to be connected to the GSPI chain. The interface is illustrated in Figure 3-12. Figure 3-12: GSPI Application Interface Connection All read or write access to the GS9092A is initiated and terminated by the host processor. Each access always begins with a 16-bit command word on SDIN indicating the address of the register of interest. This is followed by a 16-bit data word on SDIN in write mode, or a 16-bit data word on SDOUT in read mode. NOTE: All unused GSPI input pins (CS, SDIN, SCLK) should be pulled up to VCC_IO. Application Host SCLK SCLK SCLK CS1 SDOUT SDIN SDOUT SDOUT CS SDIN SDIN CS2 GS9092A GS9092A CS |
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Similar Description - GS9092A |
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