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參數(shù)資料
| 型號： | MC145225 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Dual PLL Frequency Synthesizers With DACs and Voltage Multipliers(帶DACs和電壓乘法器的雙PLL頻率合成器) |
| 中文描述： | 雙鎖相環(huán)頻率合成器與DAC和電壓倍增器（帶數(shù)模轉(zhuǎn)換器和電壓乘法器的雙鎖相環(huán)頻率合成器） |
| 文件頁數(shù)： | 59/71頁 |
| 文件大?。?/td> | 906K |
| 代理商： | MC145225 |
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MC145225 MC145230
59
MOTOROLA RF/IF DEVICE DATA
Don’t Care
Nibble
(Shifted in First)
Least
Significant Nibble
(Shifted in Last)
0
C REGISTER
Conventional Access
0
0
0
Most Significant
Nibble
(Shifted in First)
Out A
Out B/Xref
Out C
BitGrabber Access
PD
Float
PD
Float
PLL
Stby
PLL
Stby
Osc
Stby
Least
Significant Nibble
(Shifted in Last)
Address Nibble
See Below
See Below
8A. QUICK REFERENCE (continued)
A3
A2
A1
A0
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
C7
C6
C5
C4
C3
C2
C1
C0
C7
C6
C5
C4
C3
C2
C1
C0
NOTES:
1. For the Out A bit to control the Output A pin as a port expander, bits R
′
21 R
′
20 must be 00, which selects Output A as a
general–purpose output. If R
′
21 R
′
20 are not equal to 00, then the Out A bit is a don’t care.
2. Whenever Osc Stby = 1, both PLL Stby and PLL
′
Stby must be 1, also.
Out A = Output A Pin Logic State
0 = Pin is forced to 0 (power up default)
1 = Pin is forced to 1
See Note 1
Out B/XRef = Output B Pin Logic State/
External Reference Selection
See table below
Out C = Output C Pin Logic State
0 = Pin is forced to 0 (power up default)
1 = Pin is forced to high impedance
PD Float = Phase Detector Float
0 = Active, normal operation (power up default)
1 = PDout–Hi/PDout–Lo are forced to high impedance
PD
′
Float = Phase Detector
′
Float
0 = Active, normal operation (power up default)
1 = PDout
′
is forced to high impedance
Osc Stby = Oscillator Standby
0 = Active, normal operation (power up default)
1 = Oscillator/reference circuit in standby
See Note 2
PLL Stby = PLL Standby
0 = Active, normal operation
1 = Main PLL in standby (power up default)
See table below
PLL
′
Stby = PLL
′
Standby
0 = Active, normal operation
1 = Secondary PLL in standby (power up default)
Mode Pin and Bit Summary
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Mode Pin
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ááááááááááááááááááááááááá
ááááááááááááááááááááááááá
ááááááááááááááááááááááááá
ááááááááááááááááááááááááá
Out B/XRef Bit
PLL Stby Bit
Reference Circuit
Output B Pin
Main PLL
0
0
0
Xtal Osc mode
0
Active
ááááááááááááááááááááááááá
0
0
1
Xtal Osc mode
Z
Standby
ááááááááááááááááááááááááá
ááááááááááááááááááááááááá
1
1
0
External Reference mode
1
Active
1
NOTES:
Xtal osc = crystal oscillator. Z = high impedance.
1
1
External Reference mode
Z
Standby
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