參數(shù)資料
型號： ISL5314IN
廠商： INTERSIL CORP
元件分類： 數(shù)字信號處理外設(shè)
英文描述： Direct Digital Synthesizer
中文描述： 8-BIT, DSP-NUM CONTROLLED OSCILLATOR, PQFP48
封裝： 7 X 7 MM, PLASTIC, MS-026BBC, LQFP-48
文件頁數(shù)： 15/16頁
文件大?。?/td> 809K
代理商： ISL5314IN
15
Control Register Description
ADDRESS
BITS
DESCRIPTION
RESET
STATE*
0
7:0
Center frequency bits CF(7:0) (LSB).
00h
1
7:0
Center frequency bits CF(15:8).
00h
2
7:0
Center frequency bits CF(23:16).
00h
3
7:0
Center frequency bits CF(31:24).
00h
4
7:0
Center frequency bits CF(39:32).
00h
5
7:0
Center frequency bits CF(47:40) (MSB). (Reset gives
f
CLK/4 output).
40h
6
7:0
Offset frequency bits OF(7:0) (LSB).
00h
7
7:0
Offset frequency bits OF(15:8).
00h
8
7:0
Offset frequency bits OF(23:16).
00h
9
7:0
Offset frequency bits OF(31:24).
00h
10
7:0
Offset frequency bits OF(39:32).
00h
11
7:0
Offset frequency bits OF(47:40) (MSB).
00h
12
7:0
Serial input control word.
01h
7:5
Select number of serial frequency input bits:
1xx = 40-bit word (weighting same as CF(47:8))
011 = 32-bit word (weighting same as CF(47:16))
010 = 24-bit word (weighting same as CF(47:24))
001 = 16-bit word (weighting same as CF(47:32))
000 = 8-bit word (weighting same as CF(47:40))
000b
4
Serial input sync position select:
1 = sync early. Sync is expected one serial clock period before the first data bit.
0 = sync late. Sync is expected one serial clock after the last data bit.
0b
3
Serial sync polarity: 1 = active low, 0 = active high.
0b
2
Serial clock polarity: 0 = rising edge, 1 = falling edge.
0b
1
Shift direction: 0 = MSB first, 1 = LSB first.
0b
0
Center frequency enable: 1 = enable, 0 = disable.
This bit can be used to zero the center frequency (CF(47:0)) to the phase accumulator. This does not zero
the processor interface registers—just the data path from the center frequency register to the phase
accumulator. The center frequency resets to f
CLK
/4.
1b
13
7:0
NCO control word.
F8h
7
Intersil reserved. Do not change.
1b
6
Serial output frequency register enable: 1 = enable, 0 = disable.
This bit enables/disables the data path from the serial frequency register to the phase accumulator,
without changing the value of the register. Should be disabled after RESET if not used.
1b
5
Phase accumulator feedback: 0 = accumulator feedback disabled, 1 = accumulator enabled.
1b
4:0
Intersil reserved. Do not change.
11000b
14
7:0
Test and timing control register. User
must
write 00h or 30h to register 14 after RESET.
10h
5:4
NCO-to-DAC setup and hold timing control. Write either 11b or 00b to these bits.
01b
15
7:0
Register 15 does not actually exist. Any write to register 15 is an UPDATE. This function is provided to
save one microprocessor control pin from being used for the UPDATE pin, if the user chooses.
N/A
* b=binary, h=hex
ISL5314
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