参数资料
型号: AD9553/PCBZ
厂商: Analog Devices Inc
文件页数: 30/44页
文件大小: 0K
描述: BOARD EVAL FOR AD9553
设计资源: AD9553 Eval Brd BOM
AD9553 Eval Brd Schematic
标准包装: 1
主要目的: 计时,时钟缓冲器 / 驱动器 / 接收器 / 变换器
已用 IC / 零件: AD9553
已供物品:
相关产品: AD9553BCPZ-ND - IC INTEGER-N CLCK GEN 32LFCSP
AD9553BCPZ-REEL7-ND - IC INTEGER-N CLCK GEN 32LFCSP
AD9553
Rev. A | Page 36 of 44
Address
Bit
Bit Name
Description
0x0C
[7:3]
Unused
Unused.
[2:0]
Charge pump clock div.
Enables the PFD clock dividers (used for test only via test mux).
000 = test clocks disabled, normal operation (default).
001 = divide feedback clock by 2.
010 = divide PFD reference input clock by 2.
011 = divide PFD reference input and feedback clocks by 2.
100 = divide pump-up clock by 2.
101 = divide pump-up and feedback clocks by 2.
110 = divide pump-up and PFD reference input clocks by 2.
111 = divide feedback, pump-up, and pump-down clocks by 2.
0x0D
[7:6]
Antibacklash control
Controls the PFD antibacklash period of the PLL. These bits are ineffective unless
Register 0x0B[6] = 1.
00 = minimum (default).
01 = low.
10 = high.
11 = maximum.
[5:1]
Unused
Unused.
0
PLL lock detector power-down
Controls power-down of the PLL lock detector.
0 = lock detector active (default).
1 = lock detector powered down.
VCO Control (Register 0x0E to Register 0x10)
Table 30.
Address
Bit
Bit Name
Description
0x0E
7
Calibrate VCO
Initiates VCO calibration (this is an autoclearing bit). This bit is ineffective unless
Register 0x0E[2] = 1.
6
Enable ALC
Enables automatic level control (ALC) of the VCO.
0 = Register 0x0F[7:2] defines the VCO level.
1 = the device automatically controls the VCO level (default).
[5:3]
ALC threshold
Controls the VCO ALC threshold detector level from minimum (000) to maximum
(111). The default is 110.
2
Enable SPI control of VCO
calibration
Enables the functionality of Register 0x0E[7].
0 = the device automatically performs VCO calibration (default).
1 = VCO calibration controlled by Register 0x0E[7].
1
Boost VCO supply
Selects VCO supply voltage.
0 = normal supply voltage (default).
1 = increase supply voltage by 100 mV.
0
Enable SPI control of VCO band
setting
Controls VCO band setting functionality.
0 = the device automatically selects the VCO band (default).
1 = VCO band defined by Register 0x10[7:1].
0x0F
[7:2]
VCO level control
Controls the VCO amplitude from minimum (00 0000) to maximum (11 1111). These
bits are ineffective unless Register 0x0E[6] = 0.
The default is 10 0000.
[1:0]
Unused
Unused.
0x10
[7:1]
VCO band control
Controls the VCO frequency band from minimum (000 0000) to maximum
(111 1111). These bits are ineffective unless Register 0x0E[0] = 1.
The default is 100 0000.
0
Unused
Unused.
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