參數(shù)資料
型號(hào)： GF9331
英文描述： GF9331 - HDTV/SDTV Motion Co-processor
中文描述： GF9331 -高清/標(biāo)清運(yùn)動(dòng)協(xié)處理器
文件頁(yè)數(shù)： 15/34頁(yè)
文件大?。?/td> 550K
代理商： GF9331
GENNUM CORPORATION
18283 - 3
15
G
5.1 Host Interface Serial Mode
The Gennum Serial Peripheral Interface (GSPI) is a 4 wire
interface comprised of serial data in (SDI), serial data out
(SDO), an active LOW serial chip select (SCS) and a clock
(SCLK). The interface operates in a master/slave
configuration, where the master provides the SCLK, SDI,
and SCS signals to the slave or slaves. The master uC_SDO
drives the slave(s) SDI input. The SDO pin is a tristate
output that allows multiple devices to drive the master
uC_SDI. Serial mode operation supports both a continuous
clock and a burst clock configuration. The serial mode
interface is illustrated in the Figure 4.
5.1.1 Serial Command Word Description
The command word consists of a 16-bit word transmitted
MSB first and contains a read/write bit, an Auto-Configure
control bit, nine reserved bits and a 5-bit address. As
shown in Figure 5.
Fig. 4 Host Interface Serial Mode
Fig. 5 Serial Command Word Bit Representation
The R/W bit indicates a Read command if R/W = HIGH, and
a write command when R/W = LOW.
5.1.2 Auto-Configure
The Auto-Configure feature will be executed when the Auto-
Configure control bit is set. All Auto-Configure registers will
be updated to their appropriate settings based on the
current video standard and operational mode.
When setting the Auto-Configure bit, the command word
should be set with only the AC bit set to 1. All of the 15
remaining bits should be set to 0. To complete the Auto-
Configuration 16 additional bits must be loaded into the
device. The state of these bits can be either HIGH or LOW.
Before Auto-Configuring the device, the standard and mode
must be set using either the host interface (HOST_EN = 1)
or the external pins (with a falling transition of HOST_EN).
This simplifies configuration while allowing customization of
many features and format parameters.
5.1.3 Serial Data Word Description
The serial data word consists of a 16-bit word as shown in
Figure 6. Serial data is transmitted or received MSB first.
Both command and data words are clocked into the
GF9330 on the rising edge of the serial clock (SCLK), which
may operate in either a continuous or burst fashion. The first
bit (MSB) of the serial output (SDO) is available following
the last falling SCLK edge of the "read" command word. The
remaining bits are clocked out on the falling edges of
SCLK.
Fig. 6 Serial Data Word Bit Representation
uC_SCS
uC_SCLK
uC_SDO
uC_SDI
MASTER (uC)
SCS (A_D)
SCLK (CS)
SDI DAT_IO[0]
SDO DAT_IO[7]
SLAVE (GF9330)
(*) ASIC Pin Name
R/W
AC
RSV
RSV
A0
A1
A2
A3
A4
RSV
RSV
RSV
RSV
RSV
RSV
RSV
MSB
LSB
D15
D14
D13
D12
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D11
D10
MSB
LSB
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