Intel E3815 FH8065301567411 Data Sheet
Product codes
FH8065301567411
PCU – Serial Peripheral Interface (SPI)
Intel
®
Atom™ Processor E3800 Product Family
Datasheet
4365
31
PCU – Serial Peripheral
Interface (SPI)
The SoC implements a SPI controller as the interface for BIOS Flash storage. This SPI
Flash device is also required to support firmware for the Trusted Execution Engine
(required). The controller supports a maximum of two SPI Flash devices, using two chip
select signals, with speeds of 20 MHz, 33 MHz or 50 MHz.
Flash device is also required to support firmware for the Trusted Execution Engine
(required). The controller supports a maximum of two SPI Flash devices, using two chip
select signals, with speeds of 20 MHz, 33 MHz or 50 MHz.
Note:
The default interface speed is 20 MHz.
Note:
SPI must operate in descriptor mode for correct operation of the SoC.
31.1
Signal Descriptions
Please see
for additional details.
The signal description table has the following headings:
•
Signal Name: The name of the signal/pin
•
Direction: The buffer direction can be either input, output, or I/O (bidirectional)
•
Platform Power: The reference power plane.
•
Description: A brief explanation of the signal’s function
I
O
I
O
I
O
I
O
I
O
I
O
I
O
O
Platform Control Unit
UAR
T
SM
B
B
iLB
SPI
PM
C
C