SmartFusion Customizable System-on-Chip (cSoC)
Revision 10 2-61
RC Oscillator
The table below describes the electrical characteristics of the RC oscillator.
RC Oscillator Characteristics
Table 2-82 • A2F060 Global Resource
Worst Commercial-Case Conditions: T
J
= 85°C, VCC = 1.425 V
Parameter Description
–1 Std.
UnitsMin.
1
Max.
2
Min.
1
Max.
2
t
RCKL
Input Low Delay for Global Clock 0.75 0.96 0.90 1.15 ns
t
RCKH
Input High Delay for Global Clock 0.72 0.98 0.86 1.17 ns
t
RCKMPWH
Minimum Pulse Width High for Global Clock 0.85 1.00 ns
t
RCKMPWL
Minimum Pulse Width Low for Global Clock 0.85 1.00 ns
t
RCKSW
Maximum Skew for Global Clock 0.26 0.31 ns
Notes:
1. Value reflects minimum load. The delay is measured from the CCC output to the clock pin of a sequential
element, located in a lightly loaded row (single element is connected to the global net).
2. Value reflects maximum load. The delay is measured on the clock pin of the farthest sequential element,
located in a fully loaded row (all available flip-flops are connected to the global net in the row).
3. For specific junction temperature and voltage-supply levels, refer to Table 2-7 on page 2-9 for derating
values.
Table 2-83 • Electrical Characteristics of the RC Oscillator
Parameter Description Condition Min. Typ. Max. Units
FRC Operating
frequency
100 MHz
Accuracy Temperature: –40°C to 100°C
Voltage: 3.3 V ± 5%
1 %
Output jitter Period jitter (at 5 K cycles) 100 ps RMS
Cycle-to-cycle jitter (at 5 K cycles) 100 ps RMS
Period jitter (at 5 K cycles) with 1 KHz / 300
mV peak-to-peak noise on power supply
150 ps RMS
Cycle-to-cycle jitter (at 5 K cycles) with 1 KHz
/ 300 mV peak-to-peak noise on power
supply
150 ps RMS
Output duty cycle 50 %
IDYNRC Operating current 3.3 V domain 1 mA
1.5 V domain 2 mA
