afs600 Actel Corporation, afs600 Datasheet - Page 33

• Manufacturer Part Number: afs600
• Description: Actel Fusion Programmable System Chips Mixed-signal Family With Optional Arm Support
• Manufacturer: Actel Corporation

RC Oscillator
The RC oscillator is an on-chip free-running clock source
generating a 100 MHz clock. It can be used as a source
clock for both on-chip and off-chip resources. When used
in conjunction with the Fusion PLL and CCC circuits, the
RC oscillator clock source can be used to generate clocks
of varying frequency and phase.
RC Oscillator Characteristics
Table 2-9 •
Parameter
F
I
DYNRC
RC
Electrical Characteristics of RC Oscillator
Operating Frequency
Accuracy
Output Jitter
Output Duty Cycle
Operating Current
Description
Temperature: 0°C to 85°C
Voltage: 3.3 V ± 5%
Temperature: –40°C to 125°C
Voltage: 3.3 V ± 5%
Period Jitter (at 5 k cycles)
Cycle–Cycle Jitter (at 5 k cycles)
Period Jitter (at 5 k cycles) with 1 kHz / 300 mV
peak-to-peak noise on power supply
Cycle–Cycle Jitter (at 5 k cycles) with 1 kHz /
300 mV peak-to-peak noise on power supply
Conditions
A d v an c ed v1 . 4
The Fusion RC oscillator is very accurate at ±1% over
commercial and industrial temperature ranges. It is an
automated clock, requiring no setup or configuration by
the user. It requires only that the power and GNDOSC
pins be connected; no external components are required.
The RC oscillator can be used to drive either a PLL or
another internal signal.
Actel Fusion Programmable System Chips
Min.
Typ.
100
100
100
150
150
50
1
3
1
Max.
Units
MHz
mA
%
%
ps
ps
ps
ps
%
2-19