Altera DisplayPort MegaCore Function Manuale Utente Pagina 173

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DPRX_MST_VCPTAB7
VC Payload ID Table
Address: 0×00a9
Direction: RW
Reset: 0×00000000
Table 10-41: DPRX_MST_VCPTAB7 Bits
Bit Bit Name Function
31:28 VCPSLOT63
VC payload ID or slot 63
27:24 VCPSLOT62
VC payload ID or slot 62
23:20 VCPSLOT61
VC payload ID or slot 61
19:16 VCPSLOT60
VC payload ID or slot 60
15:12 VCPSLOT59
VC payload ID or slot 59
11:8 VCPSLOT58
VC payload ID or slot 58
7:4 VCPSLOT57
VC payload ID or slot 57
3:0 VCPSLOT56
VC payload ID or slot 56
Sink AUX Controller Interface
The following sections describe the registers for the AUX Controller interface.
DPRX_AUX_CONTROL
For transaction requests:
1. Wait for MSG_READY (in register DPRX_AUX_STATUS) to be 1, or enable the interrupt with AUX_IRQ_EN
and wait for the interrupt request.
2. Read the transaction request total length from LENGTH.
3. Read the transaction request command from DPRX_AUX_COMMAND., which clears MSG_READY and
LENGTH.
4. Read the transaction request data payload from registers DPRX_AUX_BYTE0 to DPRX_AUX_BYTE15 (read
LENGTH - 1 bytes).
For transaction replies:
1. Wait for READY_TO_TX (in register DPRX_AUX_STATUS) to be 1. Implement a timeout.
2. Write registers DPRX_AUX_COMMAND to DPRX_AUX_BYTE18 with transaction command and data payload.
3. Write LENGTH with the transaction total message length (1 to 17, 1 for the command plus 1 to 16 for
the data payload) and set TX_STROBE to 1. This sequence starts the reply transmission.
10-22
DPRX_MST_VCPTAB7
UG-01131
2015.05.04
Altera Corporation
DisplayPort Sink Register Map and DPCD Locations
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