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參數(shù)資料
| 型號： | PS2500 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | XO, clock |
| 英文描述： | Low-Power Direct Digital Modulation Frequency Synthesizer |
| 中文描述： | 低功耗直接數(shù)字調(diào)制頻率合成器 |
| 文件頁數(shù)： | 3/28頁 |
| 文件大?。?/td> | 184K |
| 代理商： | PS2500 |
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PS2500 2.2 GHz Fractional-N Frequency Synthesizer
- 3 -
Philsar Semiconductor Inc.
146 Colonnade Road S.
Nepean, Ontario, Canada
K2E 7Y1
Tel: 613-274-0922
Fax: 613-274-0915
www.philsar.com
PMP-001-DS2 V1.2
Figure 1: PS2500 Block Diagram
Product Description
Serial Interface
The serial interface is a versatile 3-wire interface,
Clock
(serial clock),
Data
(serial input) and
/CS
(chip
select). It enables the PS2500 to operate in a system where one or multiple masters and slaves are present.
To perform a loop-back test at start-up and to check the integrity of the board and processor, the serial data
can be fed back to the master device (for example, MCU/MPU) through a programmable multiplexer. This
facilitates hardware and software debugging.
For more information, see “Serial Interface” on page 5.
Registers
There are ten 16-bit registers in the PS2500. For more information, see “Registers” on page 19 and
“Register Descriptions” on page 19.
Main and Auxiliary
Σ
Modulators
The PS2500 uses a proprietary (patent pending) configurable 10-bit or 18-bit
Σ
modulator for the main
synthesizer and 10-bit
Σ
modulator for the auxiliary synthesizer to provide fractionality.
Modul.data
Main
Σ
Main Div.
Modul.Ctl
Ref. Div
SynthCtl
Aux.Div.
Aux.
Σ
Registers
Serial
Interface
Σ
18-bit
Modulation
Unit
Main
Prescaler
Main
Divider
Main
Phase/Freq.
Detector
and
Charge Pump
Reference
Frequency
Oscillator
Fractional
Unit
Auxiliary
Phase/Freq.
Detector
and
Charge Pump
Reference
Frequency
Dividers
Σ
10-bit
Auxiliary
Divider
Fractional
Unit
Auxiliary
Prescaler
Data
Clock
/CS
F
vco_main
/F
vco_main
F
vco_aux
/F
vco_aux
F
ref_main
F
ref_aux
CP
out_aux
LD/PS
aux
CP
out_main
LD/PS
main
Lock Detection or
Power Steering
Lock Detection or
Power Steering
F
ref
Mux_out
Mux
F
pd_main
F
pd_aux
Mod_in
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