Altera Stratix V Avalon-ST Bedienungsanleitung Seite 99

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Signal Name Direction Description
link_train
Output Reported as Bit 10 of the Link Status Register. When
asserted, indicates that the link is training.
l0state
Output When asserted, indicates that the LTSSM is in the L0 state.
l0sstate
Output When asserted, indicates that the LTSSM is in L0 or L0s state.
rx_val_pm[0]
Output When asserted, indicates the Configuration Space has received a
Power Management DLLP.
rx_typ_pm[2:0]
Output Signals the type of received PM DLLP. Has the following values:
000b: PM_Enter_L1
001b: PM_Enter_L2L3
011b: PM_AS_Request_L1
100b: PM_Request_Ack
tx_ack_pm
Output Pulse. Ack from TX Data Link in response to Power
Management DLLP request tx_req_pm_pld.
ack_phypm[1:0]
Output Acknowledge of transition to and from the low-power state when
operations have been completed. The acknowledge bit mapping
is the same as the request bit mapping.
Bit 0: rxelecidle deasserted or Training Sequence 1 (TS1)
received, or rxvalid deasserted. Used for L1 exit.
Bit 1: RX Electrical Idle Ordered Set detected or TS1 received.
vc_status[0]
Output When asserted, indicates that VC0 credits are initialized. When
asserted, the VC Negotiation Pending bit of the VC Resource
Status Register can be cleared indicating that negotiation is
complete.
rxfc_max
Output When asserted, indicates the Transaction Layer has no high
priority FC updates to send. High priority updates occur under
the following conditions:
1. The FC update timer expires because no new credits have
become available in the timeout period since last update.
2. The source has used all header credits from the last FC update
and header credits have freed up.
3. The last FC update did not give the source enough data
credits to send a maximum payload TLP and data credits have
since freed up.
Detects when TLP processing is complete for entry into low
power state.
UG-01097_avst
2014.12.15
Configuration Space Bypass Mode Interface Signals
5-47
Interfaces and Signal Descriptions
Altera Corporation
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