Intel C2518 FH8065501516710 Data Sheet
Product codes
FH8065501516710
Volume 3—Signal Electrical and Timing Characteristics—C2000 Product Family
High-Speed UART Interface
Intel
®
Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 3 of 3
September 2014
666
Order Number: 330061-002US
33.13
High-Speed UART Interface
33.13.1
DC Specifications
contains the DC specifications for the high-speed UART interface signals.
These signals are in the 3.3V Core power well of the SoC.
• UART0_RXD (Input)
• UART1_RXD (Input)
• UART0_TXD (Output)
• UART1_TXD (Output)
• UART1_RXD (Input)
• UART0_TXD (Output)
• UART1_TXD (Output)
33.13.2
Interface Timing Parameters and Waveforms
, and
contain the timing specifications for the high-speed
UART interface signals.
Notes:
1.
Based on the total trace length of 1-4” total maximum, capacitance of 27 pF and board impedance of
30–75 Ω.
2.
Measured from 10–90%.
3.
Each bit including start and stop bit is sampled three times at center of a bit at an interval of 20 ns
(minimum). If three sampled values do not agree, then UART noise error is generated.
Table 33-21. High-Speed UART Signal DC Specifications
Symbol
Parameter
Min
Max
Unit
Note
V
IL
Input Low Voltage
–0.3
0.8
V
V
IH
Input High Voltage
2.0
V3P3S+0.3
V
V
OL
Output Low Voltage
–
0.4
V
@ 4 mA
V
OH
Output High Voltage
2.4
V3P3S
V
@ –4 mA
Table 33-22. High-Speed UART Signal Timing Specifications
Symbol
Parameter
Min
Max
Units
Fig
Notes
T
RISE
Rise Time
2.5
5
ns
1, 2
T
FALL
Fall Time
2.5
5
ns
1, 2
T
UARTFILL
UART Sampling Filter Period
20
—
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3