Kontron COMe-cP2020 - Manual (Page 67)

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COMe-P2020 User Guide
67
Table 3-62: 0x351: PCIe Control/Status Register
ACTION D7 D6 D5 D4 D3 D2 D1 D0
READ 0 0 0 LANEREV 0 0 PERST1 PERST0
WRITE NU NU NU NU NU NU PERST1 PERST0
POWER UP 0 0 0 0 0 0 0 0
BITFIELD DESCRIPTION
[D0] PERST0 PCIe slot#0 card reset:
'0' = Card reset is not activ
'1' = Card reset is active
Reset is automatically asserted when CPU is in reset state
[D1] PERST1 PCIe slot#1 card reset:
'0' = Card reset is not activ
'1' = Card reset is active
Reset is automatically asserted when CPU is in reset state
[D4] LANEREV PCIe Lane reversal:
'0' = Lane reversal is not active
'1' = Lane reversal is active
Table 3-63: 0x370: Carrier Interrupt Direction Register
ACTION D7 D6 D5 D4 D3 D2 D1 D0
READ 0 0 0 Dir4 Dir3 Dir2 Dir1 Dir0
WRITE NU NU NU Dir4 Dir3 Dir2 Dir1 Dir0
POWER UP 0 0 0 0 0 0 0 0
BITFIELD DESCRIPTION
[D0] Dir0 IO-Direction of line CON_IRQ[1]#:
'0' = Line is used as Input (and forces automatically UC_IRQ[7]# line when enabled)
'1' = Line is used as Output (and driven by UC_IRQ[7]# line)
[D1] Dir1 IO-Direction of line CON_IRQ[2]#:
'0' = Line is used as Input (and forces automatically UC_IRQ[8]# line when enabled)
'1' = Line is used as Output (and driven by UC_IRQ[8]# line)
[D2] Dir2 IO-Direction of line CON_IRQ[3]#:
'0' = Line is used as Input (and forces automatically UC_IRQ[9]# line when enabled)
'1' = Line is used as Output (and driven by UC_IRQ[9]# line)
[D3] Dir3 IO-Direction of line CON_IRQ[4]#:
'0' = Line is used as Input (and forces automatically UC_IRQ[10]# line when enabled)
'1' = Line is used as Output (and driven by UC_IRQ[10]# line)
[D4] Dir4 IO-Direction of line CON_IRQ[5]#:
'0' = Line is used as Input (and forces automatically UC_IRQ[11]# line when enabled)
'1' = Line is used as Output (and driven by UC_IRQ[11]# line)
N O T I C E
Register settings control as well direction of *UC_IRQ[11:7]#* lines. If equivalent *CON_IRQ[5:1]#*
line is used as Input, equivalent *UC_IRQ[11:7]#* line is automatically configured as Output, if
*CON_IRQ[5:1]#* is used as Output, equivalent *UC_IRQ[11:7]#* is configured as Input, for details
see table below: