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GS1661 Datasheet(PDF) 63 Page - Semtech Corporation |
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GS1661 Datasheet(HTML) 63 Page - Semtech Corporation |
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63 / 84 page  GS1661 HD/SD SDI Receiver Data Sheet 53751 - 3 September 2012 63 of 84 NOTE 2: After the ancillary data determined by the ANC_TYPE_X_APX registers has been deleted, other existing ancillary data may not be contiguous. The device does not concatenate the remaining ancillary data. NOTE 3: Reading extracted ancillary data from the host interface must be performed while there is a valid video signal present at the serial input and the device is locked (LOCKED signal is HIGH). 4.18 GSPI - HOST Interface The GSPI, or Gennum Serial Peripheral Interface, is a 4-wire interface provided to allow the system to access additional status and control information through configuration registers in the GS1661. The GSPI is comprised of 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 JTAG/HOST is HIGH, the JTAG interface is enabled. When operating in GSPI mode, the SCLK, SDIN, and CS signals must be provided by the system. 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. See Section 4.18.2 for details. The interface is illustrated in the Figure 4-26 below. Figure 4-26: GSPI Application Interface Connection All read or write access to the GS1661 is initiated and terminated by the system host processor. Each access always begins with a Command/Address Word, followed by a data write to, or data read from, the GS1661. Application Host SCLK SCLK SCLK CS1 SDOUT SDIN SDOUT SDOUT CS SDIN SDIN CS2 GS1661 GS1661 CS |
Similar Part No. - GS1661 |
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Similar Description - GS1661 |
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