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P5040/P5020 Reference Design Board User Guide, Rev. 0
Freescale Semiconductor
21
Architecture
5.1.11
eOpenPIC Interrupt Controller
The reference board contains numerous interrupt connections. The P5040/P5020 eOpenPIC connections
to the P5040/P5020 are shown in this table.
5.1.12
GPIO Signals
FPGA provides the control for EMI1 mux; therefore, software can configure the MDIO bus. See the MDIO
section for how to select between RGMII and SGMII PHY.
5.1.13
Control Group
P5040/P5020 control group signals, for the most part, stop or restart execution.
connections overview and shows the POR flow while
•
Legacy COP and Aurora connector resets are muxed to the ngPIXIS FPGA.
Table 10. P5040/P5020
Interrupt Assignments
Signal Name
Interrupt Source
Description
IRQ0_B
—
—
IRQ1_B
DS3232 (U50)
System RTC.
IRQ2_B
Zilker ZL6100 PS_CB
Two ZL6100 SALRT outputs.
Zilker ZL6100 PS_GVDD
IRQ3_B
Onboard RGMII PHY (J36)
• VSC8244 interrupts 0,1 (wire-OR’d)
• Optional 1588 Riser Card
IRQ4_B
ngPIXIS FPGA
From Local Event Switch.
IRQ5_B
NOR FLASH Memory RD/BY
Indicates completion of FLASH programming.
IRQ6_B
Reserved
IRQ7_B
IRQ8_B
IRQ9_B
IRQ10_B
Analog Device Thermal Monitor ADT461
ALERT PIN
IRQ11_B
THERM PIN
IRQ_OUT_B
P5040/P5020
ngPIXIS FPGA used as an EVT pin.
Table 11. Future Options for Configuring P5040/P5020-Dedicated GPIO Signals
for EMI MDIO Bus Multiplexing
Signal Name
System Function
GPIO[0:1]
EM1 management bus mux control
GPIO[4:7]
Spares connected to test points