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參數(shù)資料
| 型號(hào)： | AD6636PCB |
| 廠商： | Analog Devices, Inc. |
| 元件分類(lèi)： | 數(shù)字上／下變頻 |
| 英文描述： | 150 MSPS Wideband Digital Down-Converter (DDC) |
| 中文描述： | 150MSPS的寬帶數(shù)字下變頻器（DDC） |
| 文件頁(yè)數(shù)： | 51/72頁(yè) |
| 文件大小： | 1629K |
| 代理商： | AD6636PCB |
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AD6636
Rev. 0 | Page 51 of 72
SRFS
SCLK
SCS
SMODE
SDI
D0
D1
D2
D3
D4
D5
D6
D7
MODE
0
Figure 46. SPORT Serial Write
SCLK
SCS
SMODE
SDI
SDO
MODE
INSTRUCTION BYTE 1
INSTRUCTION BYTE 2
VALID OUTPUT
SRFS
STFS
0
Figure 47. SPORT Serial Readback
If the example is for MSBFIRST = 1, then the instruction words
are 0x07 (Address 7) and 0x87 (MSB = 1 for read, followed by
the number of address locations to read). The data coming out
on the SDO corresponds to Addresses 0x07 to 0x01, in that
order. The instruction words are written MSB first and data
comes out on the SDO with the MSB first.
Connecting the AD6636 Serial Port to a Blackfin DSP
In SPI mode, the Blackfin DSP must act as a master to the
AD6636 by providing the SCLK. SDO is an open-drain output,
so that multiple slave devices can be connected together.
Figure 48 shows typical interconnections.
SMODE
SCLK
SPISS
SRFS
AND
STFS
SDI
SCK
MOSI
MISO
SCS
SDO
PF2
PROGRAMMABLE FLAG
MODE
BLACKFIN
(MASTER)
AD6636
(SLAVE)
VDDIO
GND
0
Figure 48. SPI Mode Serial Port Connections to Blackfin DSP
In SPORT mode, the Blackfin provides the SCLK, SRFS, and
STFS signals, as shown in Figure 49.
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