Samsung S3C6400X User Manual page 78

S3C6400X RISC MICROPROCESSOR
AHB bus control register
Most multimedia IPs are connected through AHB 2.0 bus system. The bus priority can be controlled using the
following three registers.
REGISTER
AHB_CON0
AHB_CON1
AHB_CON2
The arbitration method for each AHB bus can be configured using "PRIOR_TYPE_name" field as follows
00: Fixed priority type. Its priority is defined using "FIX_PRIOR_name" field.
01: Last grant lowest. Last granted master has lowest arbitration value.
10: Rotation.
When the priority type filed selects the fixed priority (00), the priority order is defined as follows,
FIX_PRIOR_nam
DISABLE_HLOCK field controls the locked operation of AHB bus system. When a master request locked
operation, a bus arbiter gives a grant when the field is '0'. If the field is '1', the master cannot get a locked grant.
ADDRESS R/W
0x7E00_F100 R/W
0x7E00_F104 R/W
0x7E00_F108 R/W
e
000
001
010
011
100
101
110
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
DESCRIPTION
Configure AHB I/P/X/F bus
Configure AHB M1/M0/T1/T0 bus
Configure AHB R/S1/S0 bus
Highest
0 – 1 – 2 – 3 – 4 – 5 – 6 – 7
1 – 2 – 3 – 4 – 5 – 6 – 0 – 7
2 – 3 – 4 – 5 – 6 – 0 – 1 – 7
3 – 4 – 5 – 6 – 0 – 1 – 2 – 7
4 – 5 – 6 – 0 – 1 – 2 – 3 – 7
5 – 6 – 0 – 1 – 2 – 3 – 4 – 7
6 – 0 – 1 – 2 – 3 – 4 – 5 – 7
SYSTEM CONTROLLER
RESET VALUE
0x0400_0000
0x0000_0000
0x0000_0000
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