參數(shù)資料
型號: AD6654CBCZ
廠商: Analog Devices Inc
文件頁數(shù): 51/88頁
文件大?。?/td> 0K
描述: IC ADC 14BIT W/4CH RSP 256CSPBGA
標準包裝: 1
位數(shù): 14
采樣率(每秒): 92.16M
數(shù)據(jù)接口: 串行,并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 2.5W
電壓電源: 模擬和數(shù)字
工作溫度: -25°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 256-BGA,CSPBGA
供應(yīng)商設(shè)備封裝: 256-CSPBGA(17x17)
包裝: 托盤
輸入數(shù)目和類型: 1 個差分,單極
AD6654
Rev. 0 | Page 55 of 88
MASTER/SLAVE PCLK MODES
The parallel ports can operate in either master or slave mode.
The mode is set via PCLK master mode bit in the Parallel Port
Control 2 register. The parallel ports power up in slave mode to
avoid possible contentions on the PCLK pin.
In master mode, PCLK is an output derived by dividing
PLL_CLK down by the PCLK divisor. The PCLK divisor can
have a value of 1, 2, 4, or 8, depending on the 2-bit PCLK
divisor word setting in the Parallel Port Control 2 register. The
highest PLCK rate in master mode is 200 MHz. Master mode is
selected by setting the PCLK master mode bit in the Parallel
Port Control 2 register.
divisor
PCLK
rate
CLK
PLL
rate
PCLK
_
=
In slave mode, external circuitry provides the PCLK signal.
Slave mode PCLK signals can be either synchronous or
asynchronous. The maximum slave mode PCLK frequency is
also 200 MHz.
PCLK
tDPREQ
PxREQ
PxACK
tDPP
Px [15:0]
I [15:8]
Q [15:8]
PxIQ
tDPIQ
PxCH [2:0]
PxCH [2:0] = CHANNEL #
tDPCH
0000 +
GAIN [11:0]
PxGAIN
tDPGAIN
05156-049
Figure 60. Parallel I/Q Mode with an AGC Gain Word
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