32.15 MPDDRC Request Port 0-1-2-3 Register

Name:	MPDDRC_REQ_PORT_0123
Offset:	0x4C
Reset:	0x00000000
Property:	Read/Write


Bit	31	30	29	28	27	26	25	24
	NRQ_NWD_BDW_P3[7:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0


Bit	23	22	21	20	19	18	17	16
	NRQ_NWD_BDW_P2[7:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
	NRQ_NWD_BDW_P1[7:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0


Bit	7	6	5	4	3	2	1	0
	NRQ_NWD_BDW_P0[7:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bits 0:7, 8:15, 16:23, 24:31 – NRQ_NWD_BDW_Px Number of Requests, Number of Words or Bandwidth Allocation from Port 0-1-2-3

The number of requests corresponds to the number of start transfers. For example, setting this field to 2 performs two burst accesses regardless of the burst type (INCR4, INCR8, etc.). The number of words corresponds exactly to the number of accesses; setting this field to 2 performs two accesses. In this example, burst accesses will be broken.

These values depend on scheme arbitration (see MPDDRC Configuration Arbiter Register).

In case of round-robin arbitration, this field is not used. In case of “bandwidth arbitration”, this field corresponds to percentage allocated for each port. In case of “request” arbitration, this field corresponds to number of start transfers or to number of accesses allocated for each port.