EP80579 Datasheet, PDF (1869/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
49.5.8
Serial Peripheral Interface (SPI)¹
This section describes the electrical characteristics of the Serial Peripheral Interface.
49.5.8.1
SPI Signal List
For SPI pin description refer to Table 48-13, “SPI Interface Signals” on page 1749.
49.5.8.2 SPI DC Characteristics
Table 49-47. SPI DC Input Characteristics
Symbol
Parameter
Conditions
Min Typical Max
Units
Notes
V_IH
Input voltage high
-
2.0
-
V
-
V_IL
Input voltage low
-
-
-
0.8
V
-
Ι_OL
Output current at
low voltage
V_OL<0.8
-
-
4
mA
-
Ι_leak
Input Leakage
Current
0<V_IN<Vcc3_3
-
-
10
µA
-
Cin
Input pin cap
-
-
-
5
pf
1
Notes:
1.
Guaranteed by design. These values are typical values seen for this process, but not measured during
production testing.
Table 49-48. SPI DC Output Characteristics
Symbol
Parameter
Conditions
Min Typical Max
Units
Notes
V_OH
Output voltage high
l_out=-6mA
2.0
-
-
V
1
V_OL
Output voltage low
l_out=6mA
-
-
0.4
V
-
Ι_OH
Output current at
high voltage
V_OH=2.4
-12
-27
-48
mA
-
Ι_OL
Output current at
low voltage
V_OL=0.8
12
18
26
mA
-
Notes:
1.
VOH spec does not apply to signals that are open drain driver. Open drain signals must have an
external pull up resistor.
49.5.8.3 SPI AC Characteristics
Table 49-49. SPI Timing Specifications (Sheet 1 of 2)
Symbol
Parameter
Min
Max
Serial Clock Period - 20 MHz Operation
17.2
18.4
t182
SPI Clock Duty cycle at the host
-
50
t183
Tco of SPI_MOSI with respect to serial clock
falling edge at the host
-5
13
Notes:
1.
The typical clock frequency driven by the EP80579 is 17.86 MHz.
Units
MHz
%
Figures
-
49-25
Notes
1
-
ns
49-25
-
1. Intel recommends using the SPI for Pre-boot firmware due to the reduced availability of LPC FWH.
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
1869