參數(shù)資料
型號(hào)： GS4901BCNE3
廠商： Gennum Corporation
英文描述： SD Clock and Timing Generator with GENLOCK
中文描述： 統(tǒng)計(jì)時(shí)鐘和定時(shí)發(fā)生器鎖相
文件頁(yè)數(shù)： 64/95頁(yè)
文件大小： 898K
代理商： GS4901BCNE3
GS4901B/GS4900B Preliminary Data Sheet
37703 - 0
April 2006
64 of 95
3.10.1 Command Word Description
The command word consists of 16 bits transmitted MSB first and includes a
read/write bit, an Auto-Increment bit and a 12-bit address.
Figure 3-12
shows the
command word format and bit configurations.
Command words are clocked into the GS4901B/GS4900B on the rising edge of the
serial clock, SCLK, which operates in a burst fashion.
When the Auto-Increment bit is set LOW, each command word must be followed
by only one data word to ensure proper operation. If the Auto-Increment bit is set
HIGH, the following data word will be written into the address specified in the
command word, and subsequent data words will be written into incremental
addresses. This facilitates multiple address writes without sending a command
word for each data word.
Auto-Increment may be used for both read and write access.
Figure 3-12: Command Word Format
Figure 3-13: Data Word Format
3.10.2 Data Read and Write Timing
Read and write mode timing for the GSPI interface is shown in
Figure 3-14
and
Figure 3-15
respectively. The timing parameters are defined in
Table 3-12
.
When several devices are connected to the GSPI chain, only one CS should be
asserted during a read sequence.
During the write sequence, all command and following data words input at the
SDIN pin are output at the SDOUT pin as is. Where several devices are connected
to the GSPI chain, data can be written simultaneously to all the devices that have
CS set LOW.
MSB
R/W
LSB
A0
A4
A5
A6
A8
A7
A9
A3
A2
A1
A10
A11
AutoInc
RSV
RSV
RSV = Reserved. Must be set to zero. R/W: Read command when R/W = 1
Write command when R/W = 0
MSB
D15
LSB
D0
D4
D5
D6
D8
D7
D9
D3
D2
D1
D10
D11
D12
D13
D14
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