參數(shù)資料
型號: IDT79RC32T351-100DH
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 28/42頁
文件大?。?/td> 0K
描述: IC MPU 32BIT CORE 100MHZ 208-QFP
產(chǎn)品變化通告: Product Discontinuation 07/Dec/2009
標準包裝: 24
系列: Interprise™
處理器類型: RISC 32-位
速度: 100MHz
電壓: 2.5V
安裝類型: 表面貼裝
封裝/外殼: 208-BFQFP
供應商設備封裝: 208-PQFP(28x28)
包裝: 托盤
其它名稱: 79RC32T351-100DH
34 of 42
May 25, 2004
IDT 79RC32351
Phase-Locked Loop (PLL)
The processor aligns the pipeline clock, PClock, to the master input clock (CLKP) by using an internal phase-locked loop (PLL) circuit that gener-
ates aligned clocks. Inherently, PLL circuits are only capable of generating aligned clocks for master input clock (CLKP) frequencies within a limited
range.
PLL Analog Filter
The storage capacitor required for the Phase-Locked Loop circuit is contained in the RC32351. However, it is recommended that the system
designer provide a filter network of passive components for the PLL power supply.
VCCP (PLL circuit power) and VSSP (PLL circuit ground) should be isolated from VCC Core (core power) and VSS (common ground) with a filter
circuit such as the one shown in Figure 19.
Because the optimum values for the filter components depend upon the application and the system noise environment, these values should be
considered as starting points for further experimentation within your specific application.
Figure 19 PLL Filter Circuit for Noisy Environments
Recommended Operating Temperature and Supply Voltage
Capacitive Load Deration
Refer to the RC32355 IBIS Model which can be found at the IDT web site (www.idt.com).
Grade
Temperature
Vss1
VssP5
VccI/O2
VccCore3
VccP4
Commercial
0
°C to +70°C Ambient
0V
3.3V±5%
2.5V±5%
1 Vss supplies a common ground.
2 VccI/O is the I/O power.
3 VccCore is the internal logic power.
4 VccP is the phase lock loop power.
5VssP is the phase lock loop ground.
Table 15 Temperature and Voltage
10
F
0.1
F
100 pF
Vcc
Vss
VccP
VssP
10 ohm1
1.This resistor may be required in noisy circuit environments.
RC32351
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