1 bus matrix master configuration registers – Rainbow Electronics AT91CAP9S250A User Manual
Page 135
135
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
20.5.1
Bus Matrix Master Configuration Registers
Register Name:
MATRIX_MCFG0...MATRIX_MCFG11
Access Type:
Read/Write
• ULBT: Undefined Length Burst Type
0: Infinite Length Burst
No predicted end of burst is generated and therefore INCR bursts coming from this master cannot be broken.
1: Single Access
The undefined length burst is treated as a succession of single accesses, allowing rearbitration at each beat of the INCR
burst.
2: Four-beat Burst
The undefined length burst is split into four-beat burst allowing rearbitration at each four-beat burst end.
3: Eight-beat Burst
The undefined length burst is split into eight-beat burst allowing rearbitration at each eight-beat burst end.
4: Sixteen-beat Burst
The undefined length burst is split into sixteen-beat burst allowing rearbitration at each sixteen-beat burst end.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
–
7
6
5
4
3
2
1
0
–
–
–
–
–
ULBT