S5PC110_UM
1
BUS CONFIGURATION
1.1.1.3 Least Recently Granted Scheme
In the Least Recently Granted (LRG) scheme, each connected SI has a single slot associated with it, but each
interface also has a priority value. This priority value, whose post-reset value can be configured at design time,
programmed, or interrogated through the APB programming interface, can make the arbiter behave as:
•
Pure LRG scheme
•
Fixed priority encoder
•
Combination of the two
All masters with the same priority form a priority group. As a result of arbitration, a master can move within its
priority group but cannot leave its group, and no new masters can join the group.
Arbitration is granted to the highest priority group from which a member is trying to win access and within that
group to the highest master at that time. When master wins arbitration, it is relegated to the bottom of its group to
ensure that it does not prevent other masters in its group from accessing the slave.
If you configure all master priorities to different levels, the arbiter implements a fixed priority scheme. This occurs
because in this case, each master is in a group of its own, and therefore, masters maintain their ordering.
If all master priorities are the same, then an LRG scheme is implemented. The reason all master priorities behave
as LRG is because the process of relegating the master that was last granted access to the bottom of its group
results in the masters being ordered from the LRG master at the top to the Most Recently Granted (MRG) at the
bottom.
The LRG and fixed priority modes concurrently exist when the master priority values are set with a combination of
identical and unique values. You can mix priority groups that contain one member with priority groups that contain
more than one member in an arbitrary manner. The arbiter places no restriction on the number of groups or their
membership.
shows the movement of masters within their priority groups.
Figure 1-3 Example Operation of LRG Arbitration Scheme
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Summary of Contents for S5PC110
Page 4: ...Section 1 OVERVIEW ...
Page 28: ...Section 2 SYSTEM ...
Page 374: ...S5PC110_UM 4 POWER MANAGEMENT 4 14 4 Let DRAMs exit from self refresh mode ...
Page 473: ...S5PC110_UM 6 BOOTING SEQUENCE 6 10 Figure 6 3 Secure Booting Diagram ...
Page 474: ...Section 3 BUS ...
Page 491: ...S5PC110_UM 2 CORESIGHT Figure 2 4 Structure of the Coresight DAP Components 2 8 ...
Page 506: ...Section 4 INTERRUPT ...
Page 537: ...Section 5 MEMORY ...
Page 540: ......
Page 703: ...Section 6 DMA ...
Page 705: ...List of Figures Figure Title Page Number Number Figure 1 1 Two DMA Tops 1 1 ...
Page 737: ...Section 7 TIMER ...
Page 795: ...Section 8 CONNECTIVITY STORAGE ...
Page 883: ...S5PC110_UM 5 USB2 0 HS OTG 5 7 5 6 3 OTG FIFO ADDRESS MAPPING Figure 5 3 OTG FIFO Mapping ...
Page 1100: ...Section 9 MULTIMEDIA ...
Page 1116: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 5 Figure 1 2 Block Diagram of the Data Flow ...
Page 1125: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 14 1 3 3 2 7 16BPP Display 1555 P1 P2 P3 P4 P5 LCD Panel ...
Page 1145: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 34 Figure 1 10 Blending Decision Diagram ...
Page 1149: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 38 Figure 1 14 Hue Control Block Diagram ...
Page 1184: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 73 ...
Page 1226: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 115 ...
Page 1328: ...S5PC110_UM 2 1BCAMERA INTERFACE 2 81 ...
Page 1369: ...S5PC110_UM 4 3BMIPI CSIS 4 2 4 2 BLOCK DIAGRAM Figure 4 1 MIPI CSI System Block Diagram ...
Page 1381: ...S5PC110_UM 4 3BMIPI CSIS 4 14 ...
Page 1431: ...S5PC110_UM 6 5BMULTI FORMAT CODEC 6 39 ...
Page 1471: ...S5PC110_UM 6 5BMULTI FORMAT CODEC 6 79 Figure 6 7 VC1 Parameters ...
Page 1626: ...S5PC110_UM 10 9BHIGH DEFINITION MULTIMEDIA INTERFACE 10 17 Figure 10 10 Channel Status Block ...
Page 1775: ...S5PC110_UM 13 12BG2D 13 6 FIMG 2D FIMG 2D FIMG 2D Figure 13 3 Rotation and Flip Example ...
Page 1798: ...Section 10 AUDIO ETC ...
Page 1803: ...S5PC110_UM 1 AUDIO SUBSYSTEM 1 2 Figure 8 7 Keypad I F Block Diagram 8 8 ...
Page 1951: ...Section 11 SECURITY ...
Page 1954: ...List of Tables Table Title Page Number Number Table 1 1 Security Features of S5PC110 1 2 ...
Page 1964: ...S5PC110_UM 2 ADVANCED CRYPTO ENGINE Figure 2 9 DES Byte Swapping Scheme 2 9 ...
Page 2005: ...Section 12 ETC ...
Page 2039: ...Section 13 SIZE BALL MAP ...