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參數(shù)資料
| 型號： | GF9331-CBP |
| 廠商： | Gennum Corporation |
| 英文描述： | DTV/SDTV Motion Co-processor |
| 中文描述： | 數(shù)字電視/標(biāo)清運(yùn)動協(xié)處理器 |
| 文件頁數(shù)： | 17/31頁 |
| 文件大?。?/td> | 337K |
| 代理商： | GF9331-CBP |
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GF9331 Data Sheet
Proprietary and Confidential
18303 - 4
June 2004
17 of 31
3.5.1 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 continuous and burst clock configurations. The interface is illustrated
in
Figure 3-4: Host Interface Serial Mode
.
Figure 3-4: Host Interface Serial Mode
3.5.1.1 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 3-5: Serial Command Word Bit Representation
.
Figure 3-5: Serial Command Word Bit Representation
The R/W bit indicates a Read command if R/W = ‘1’, and a write command when
R/W = ‘1’.
DAT_IO[7]
Data/address (bit 7)
SDO - Serial data out
A_D
Address/data select
SCS - Serial chip select
R_W
Read/write select
(not used)
HOST_EN
Host Interface enable
Host Interface enable
SER_MD
LOW = Parallel mode enable
HIGH = Serial mode enable
Table 3-4: Host Interface Common Pins (Continued)
GF9331 Pin Name
Parallel Mode
Serial Mode
uC_SCS
uC_SCLK
uC_SDO
uC_SDI
MASTER (uC)
SCS (A_D)
SCLK (CS)
SDI (DAT_IO0)
SDO (DAT_IO7)
SLAVE (GF9331)
R/W
AC
RSV
RSV
A0
A1
A2
A3
A4
RSV
RSV
RSV
RSV
RSV
RSV
RSV
MSB
LSB
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