Altera Stratix V Avalon-ST Manual do Utilizador Página 79

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1. A rising edge on app_intx_req indicates the assertion of the corresponding legacy interrupt from the
client.
2. In response, the PF drives Assert_INTx to activate a legacy interrupt.
3. A falling edge on app_int_sts_x indicates the deassertion of the corresponding legacy interrupt from
the client.
4. In response, the PF sends Deassert_INTx to deactivate the legacy interrupt.
The Interrupt Pin register specifies the interrupt input used to signal interrupts. The PFs may be
configured with separate interrupt pins. Or, both PFs may share a common interrupt pin. You configure
the Interrupt Pin register in Qsys.
The Interrupt Line register specifies the interrupt controller (IRQ0–IRQ15) input of the in the Root
Port activated by each Assert_INTx message. You configure the Interrupt Line register in Qsys.
Table 5-3: Interrupt Line and Interrupt Pin Register -0x03C
Bit Location Description Default Value Access
[15:11] Not implemented 0 RO
[10:8] Interrupt Pin register. When legacy interrupts are enabled,
specifies the pin this function uses to signal an interrupt . The
following encodings are defined:
3'b001: INTA_IN
3'b010: INTB_IN
3'b011: INTC_IN
3'b100: INTD_IN
Specify in Qsys RO
[7:0] Interrupt Line register. Identifies the interrupt controller IRQx
input of the Root Port that is activated by this function’s
interrupt. The following encodings are defined:
6'h000000: IRQ0
6'h000001: IRQ1
6'h000002: IRQ2
...
6'h0000FF: unknown or not connected
Specify in Qsys RO
Related Information
PCI Local Bus Specification 3.0
UG-01097_sriov
2014.12.15
Interrupt Line and Interrupt Pin Register
5-5
Registers
Altera Corporation
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