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參數(shù)資料
| 型號(hào)： | DS1073M-66 |
| 元件分類： | RS-485 |
| 英文描述： | Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers |
| 中文描述： | 3V的EconOscillator /分頻器 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大?。?/td> | 260K |
| 代理商： | DS1073M-66 |
DS1073
4 of 18
USER-PROGRAMMABLE REGISTERS
The following registers can be programmed by the user to determine operating frequency and mode of
operation. Details of how these registers are programmed can be found in a later section, in this section
the function of the registers are described. The register settings are non-volatile, the values being stored
automatically in EEPROM when the registers are programmed. Note: The register bits cannot be used to
make mode or frequency changes on the fly. Changes can only be made by powering the device up in
“Programming” mode. For them to be become effective the device must then be powered down and
powered up again in “Operation” mode.
For programming purposes the register bits are divided into two 9-bit words: the MUX word determines
mode of operation and prescaler values; the DIV word sets the value of the programmable divider.
MUX WORD
Figure 2
(MSB)
0*
*These bits must be set to 0
(LSB)
DIV1
0*
0*
EN0
PDN
M
MSEL
E/
I
E/
I
This bit selects either the internal oscillator or the external/ crystal reference.
1 = External/Crystal
0 = Internal Oscillator
however, if the PDN bit is set to 0 the E/
I
bit will be overridden by the logic level on the
PDN
/
SELX
pin.
Table 1
PDN
BIT
0
0
1
1
1
E/
I
X
X
X
0
1
(PDN
/
SELX
PIN
0
1
0
1
1
OSCILLATOR MODE
EXTERNAL/CRYSTAL
INTERNAL
POWER-DOWN
INTERNAL
EXTERNAL/CRYSTAL
DIV1
This bit allows the master clock to be routed directly to the output (DIV1 = 1). The N programmable
divider is bypassed so the programmed value of N is ignored. The frequency of the output (f
OUT
) will be
INTCLK or EXTCLK depending on which reference has been selected. If the Internal clock is selected
the M prescaler may still be used, so in this case f
OUT
= INTOSC/M (which also equals MCLK and
INTCLK). If DIV1 = 0 the programmable divider functions normally.
MSEL
This bit determines whether or not the M prescaler is bypassed.
MSEL
= 1 will bypass the prescaler.
MSEL
= 0 will switch in the prescaler, with a divide-by number determined by the M bit.
M
This bit sets the divide-by number for the prescaler. M = 0 results in divide-by-4, M = 1 results in divide-
by-2. The setting of this bit is irrelevant if
MSEL
= 1.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1073M-80 | 功能描述:可編程振蕩器 RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負(fù)載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
| DS1073-SPECIAL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Special EconOscillator/Divider |
| DS1073Z-100 | 功能描述:可編程振蕩器 RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負(fù)載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
| DS1073Z-10A | 功能描述:可編程振蕩器 RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負(fù)載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
| DS1073Z-10A/T&R | 功能描述:可編程振蕩器 RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負(fù)載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
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