Samsung S5PC100 User Manual page 318

S5PC100 USER'S MANUAL (REV1.0)
3.2.3 Channel Arbitration Registers
(M0/M1/M2, W, Address = 0xE300_0408, 0xE300_040C, 0xE300_0428, 0xE300_042C,
0xE300_0448, 0xE300_044C)
•
Writes data case
M0 / M1 / M2
Slot
Reserved
Priority
SI Number
NOTE: It is important to ensure that a value is written only to the slot that already contains the priority value for the SI whose
priority you want to modify - writes are ignored if this is not the case. This behavior is required because the arbitration
system must maintain exactly one slot for each SI for correct operation.
You cannot program the RR scheme; therefore writes are completed but are ignored.
•
Reads data case (W)
Slot number writing before read
M0 / M1 / M2
Special Format
Slot
•
Read arbitration data (R)
M0 / M1 / M2
Reserved
Arbitration Data
All other AXI interconntects are not need to be programmed by user.
Bit
[31:24] The slot for which the data is to be written
[23:16] Reserved
[15:8] The priority value
[7:0] The SI number for which the priority value applies
Bit
[31:8] 0xFF0000 indicates its slot number writing function
[7:0] The slot for which the data is to be read
Bit
[31:8] Reserved
[7:0] The format of the returned data depends on the arbitration
scheme. The RR scheme returns the SI number that
occupies that slot in the LSB of the read data.
The LRG scheme returns the priority and SI number in the
same positions as they occupy in write data.
Description
Description
Description
NOTES
BUS CONFIGURATION
Reset Value
-
-
-
-
Reset Value
-
-
Reset Value
-
0x0
3.1-9