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參數(shù)資料
型號: AD9552/PCBZ
廠商: Analog Devices Inc
文件頁數(shù): 20/32頁
文件大小: 0K
描述: BOARD EVALUATION FOR AD9552
設計資源: Clock Distribution Circuit with Pin-Programmable Output Frequency, Output Logic Levels, and Fanout (CN0152)
AD9552 Schematics
AD9552 Layout
標準包裝: 1
主要目的: 計時,時鐘發(fā)生器
嵌入式:
已用 IC / 零件: AD9552
主要屬性: 6.6 MHz ~ 112.5 MHz 輸入
次要屬性: CMOS,LVPECL 和 LVDS 兼容
已供物品:
Data Sheet
AD9552
Rev. E | Page 27 of 32
Address
Bit
Bit Name
Description
0x18
[7:3]
P
1 divider
Bits[4:0] of the 6-bit P
1 divider for OUT1 (1 ≤ P1 ≤ 63). Do not set these bits to 000000. Default is
P
1 = 10 0000 (32). The P1 bits are ineffective unless Register 0x19[7] = 1.
[2:0]
P
0 divider
The 3-bit P
0 divider for OUT1. The P0 divide value is as follows:
000 = 4 (default).
001 = 5.
010 = 6.
011 = 7.
100 = 8.
101 = 9.
110 = 10.
111 = 11.
The P
0 bits are ineffective unless Register 0x19[7] = 1.
0x19
7
Enable SPI control of
OUT1 dividers
Controls functionality of OUT1 dividers.
0 = OUT1 dividers defined by the Y[5:0] pins (default).
1 = contents of Register 0x17 and Register 0x18 define OUT1 dividers (P
0 and P1).
[6:0]
Unused
Unused.
Input Receiver and Band Gap Control (Register 0x1A)
Table 22.
Address
Bit
Bit Name
Description
0x1A
7
Receiver reset
Input receiver reset control. This is an autoclearing bit.
0 = normal operation (default).
1 = reset input receiver logic.
[6:2]
Band gap voltage adjust
Controls the band gap voltage setting from minimum (0 0000) to maximum (1 1111).
Default is 0 0000.
1
Unused
Unused.
0
Enable SPI control of band gap
voltage
Enables functionality of Bits[6:2].
0 = the device automatically selects receiver band gap voltage (default).
1 = Bits[6:2] define the receiver band gap voltage.
XTAL Control (Register 0x1B to Register 0x1D)
Table 23.
Address
Bit
Bit Name
Description
0x1B
7
Disable SPI control of XTAL
tuning capacitance
Disables functionality of Bits[5:0].
0 = tuning capacitance defined by Bits[5:0].
1 = the device automatically selects XTAL tuning capacitance (default).
6
Unused
Unused.
[5:0]
XTAL tuning capacitor control
Capacitance value coded as inverted binary (0.25 pF per bit); that is, 111111 is 0 pF,
111110 is 0.25 pF, and so on. The default value, 000000, is 15.75 pF.
0x1C
[7:0]
Unused
Unused.
0x1D
[7:3]
Unused
Unused.
2
Select 2× frequency multiplier
Select/bypass the 2× frequency multiplier.
0 = bypassed (default).
1 = selected.
1
Unused
Unused.
0
Use crystal resonator
Automatic external reference select override.
0 = the device automatically selects the external reference path if an external
reference signal is present (default).
1 = the device uses the crystal resonator input whether or not an external reference
signal is present.
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