SAMA5D44_14 Datasheet, PDF (461/1776 Pages) ATMEL Corporation – Atmel | SMART ARM-based Embedded MPU

29.7.18 MPDDRC Request Port 0-1-2-3 Register
Name:
MPDDRC_REQ_PORT_0123
Address: 0xF001004C
Access:
Read/Write
31
30
29
28
27
26
25
24
NRQ_NWD_BDW_P3
23
22
21
20
19
18
17
16
NRQ_NWD_BDW_P2
15
14
13
12
11
10
9
8
NRQ_NWD_BDW_P1
7
6
5
4
3
2
1
0
NRQ_NWD_BDW_P0
• NRQ_NWD_BDW_Px: Number of Requests, Number of Words or Bandwidth Allocation from Port 0-1-2-3
Reset value is 0.
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,...). 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 are function of scheme arbitration (see “MPDDRC Configuration Arbiter Register” on page 458).
In case of round-robin arbitration, this field is not used. In case of “bandwidth arbitration”, this field corresponds to percent-
age 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.
SAMA5D4 Series [DATASHEET]
Atmel-11238A-ATARM-SAMA5D4-Datasheet_30-Sep-14
461