參數(shù)資料
型號： GS9092-CNE3
廠商： Gennum Corporation
英文描述： GS9092 GenLINX-R III 270Mb/s Serializer for SDI and DVB-ASI
中文描述： GS9092 GenLINX - R的第三270Mb / s的串行SDI和DVB - ASI在內
文件頁數(shù)： 49/58頁
文件大?。?/td> 608K
代理商： GS9092-CNE3
GS9092 Data Sheet
28202 - 2
September 2005
49 of 58
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 GS9092 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 3-10
.
Figure 3-10: GSPI Application Interface Connection
All read or write access to the GS9092 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
GS9092
GS9092
CS
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