參數(shù)資料
型號： AD9548/PCBZ
廠商： Analog Devices Inc
文件頁數(shù)： 83/112頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR AD9548
產(chǎn)品變化通告： AD9548 Mask Change 20/Oct/2010
設(shè)計資源： AD9548 Schematic
AD9548 BOM
AD9548 Eval Brd Layers
標(biāo)準(zhǔn)包裝： 1
主要目的： 計時，時鐘發(fā)生器
嵌入式： 否
已用 IC / 零件： AD9548
主要屬性： 62.5 ~ 450 MHz 輸出頻率
次要屬性： SPI 和 I2C 兼容控制端口
已供物品： 板
AD9548
Data Sheet
Rev. E | Page 72 of 112
Table 46. Nominal System Clock (SYSCLK) Period1
Address
Bits
Bit Name
Description
0x0103
[7:0]
System clock period
(expressed in
femtoseconds)
System clock period, Bits[7:0]
0x0104
[7:0]
System clock period, Bits[15:8]
0x0105
[7:5]
Unused
[4:0]
System clock period
System clock period, Bits[20:16]
1
Units are femtoseconds. The default value is 0x0F424 = 1,000,000 (1 ns) and implies a system clock frequency of 1 GHz.
Table 47. System Clock Stability Period1
Address
Bits
Bit Name
Description
0x0106
[7:0]
System clock stability
period
System clock stability period, Bits[7:0] (default = 0x01)
0x0107
[7:0]
System clock stability period, Bits[15:8] (default = 0x00)
0x0108
[7:4]
Unused
[3:0]
System clock stability
period
System clock stability period, Bits[19:16] (default = 0x0)
(default period = 0x00001, or 1 ms)
1
Units are milliseconds. The default value is 0x000001 = 1 (1 ms).
GENERAL CONFIGURATION (REGISTER 0x0200 TO REGISTER 0x0214)
Register 0x0200 to Register 0x0207—Multifunction Pin Control (M0 to M7)
Table 48. Multifunction Pin (M0 to M7) Control1
Address
Bits
Bit Name
Description
0x0200
[7]
M0 in/out
In/out control for the M0 pin
0 (default) = input (control pin)
1 = output (status pin)
[6:0]
M0 function
See Table 25 and Table 26 (default = 0xb0000000)
0x0201
[7]
M1 in/out
In/out control for the M1 pin (same as M0)
[6:0]
M1 function
See Table 25 and Table 26 (default = 0xb0000000)
0x0202
[7]
M2 in/out
In/out control for the M2 pin (same as M0)
[6:0]
M2 function
See Table 25 and Table 26 (default = 0xb0000000)
0x0203
[7]
M3 in/out
In/out control for the M3 pin (same as M0)
[6:0]
M3 function
See Table 25 and Table 26 (default = 0xb0000000)
0x0204
[7]
M4 in/out
In/out control for the M4 pin (same as M0)
[6:0]
M4 function
See Table 25 and Table 26 (default = 0xb0000000)
0x0205
[7]
M5 in/out
In/out control for the M5 pin (same as M0)
[6:0]
M5 function
See Table 25 and Table 26 (default = 0xb0000000)
0x0206
[7]
M6 in/out
In/out control for the M6 pin (same as M0)
[6:0]
M6 function
See Table 25 and Table 26 (default = 0xb0000000)
0x0207
[7]
M7 in/out
In/out control for the M7 pin (same as M0)
[6:0]
M7 function
See Table 25 and Table 26 (default = 0xb0000000)
1
The default setting for all the multifunction pins is as an unused control input pin.
Table 49. IRQ Pin Output Mode
Address
Bits
Bit Name
Description
0x0208
[7:2]
Unused
[1:0]
IRQ pin output mode
Select the output mode of the IRQ pin
00 (default) = NMOS, open drain (requires an external pull-up resistor)
01 = PMOS, open drain (requires an external pull-down resistor)
10 = CMOS, active high
11 = CMOS, active low
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