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參數(shù)資料
| 型號： | DS1077 |
| 英文描述： | 10/100/1000 Base-T Ethernet LAN Switch |
| 中文描述： | EconOscillator™/分頻器 |
| 文件頁數(shù)： | 5/21頁 |
| 文件大?。?/td> | 286K |
| 代理商： | DS1077 |
DS1077
5 of 21
SHUTDOWN CONTROL WITH PDN0 AND PDN1
Table 3
PDN0
(BIT)
(BIT)
0
0
0
1
1
0
1
1
CTRL0 OR CTRL1
*CTRL0 performs a power-down if SEL0 and EN0 are both 0 (see Table 1).
PDN1
SHUTDOWN CONTROL
NONE*
CTRL1
CTRL0
REGISTER FUNCTIONS
The user programmable registers can be programmed by the user to determine the mode of operation
(MUX), operating frequency (DIV), and bus settings (BUS). Details of how these registers are
programmed can be found in a later section; in this section the functions of the registers are described.
The register settings are nonvolatile, the values being stored automatically or as required in EEPROM
when the registers are programmed via the SDA and SCL pins.
MUX WORD
MSB LSB MSB
Name
* PDN1
PDN0
SEL0
Default
setting
LSB
- -
x x x
EN0
1
0M1
0
0M0
0
1M1
0
1M0
0
DIV1
0
-
x x x
-
-
-
0
0
0
1
first data byte
second data byte
*This bit must be set to zero.
DIV1 (bit)
This bit allows the output of the Prescaler P1 to be routed directly to the OUT1 pin (DIV1 = 1). The N
divider is bypassed so the programmed value of N is ignored. If DIV1 = 0 (default) the N divider
functions normally.
0M1, 0M0, 1M1, 1M0 (bits)
These bits set the prescalers P0 and P1, to divide by 1, 2, 4, or 8 (see Table 4).
PRESCALER DIVISOR M SETTINGS
Table 4
Prescaler
P0 Divisor
“M”
0
0
1
**
0M1
0M0
1M1
1M0
Prescaler
P1 Divisor
“M”
1
**
0
0
0
1
2
0
1
2
1
0
4
1
0
4
1
1
8
1
1
8
**Default Condition
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| DS1077LU-40 | 功能描述:可編程振蕩器 EconOscillator/Dvdr 40Mhz 118mil 2-Wire 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: |
| DS1077LU-40+ | 功能描述:可編程振蕩器 EconOscillator/Dvdr 40Mhz 118mil 2-Wire 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: |
| DS1077LU-40+T | 功能描述:可編程振蕩器 EconOscillator/Dvdr 40Mhz 118mil 2-Wire 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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