ARM920T_14 Datasheet, PDF (129/350 Pages) ATMEL Corporation – Technical Reference Manual

Bus Interface Unit
6.3.7
Buffered and nonbuffered STM
For a buffered or nonbuffered STM the BURST[1:0] information is:
11
Buffered STM, no burst or undefined burst length.
00
Nonbuffered STM, no burst or undefined burst length.
The address is word-aligned. An example nonbuffered STM is shown in Figure 6-7.
BCLK
BA[31:0]
0x108
0x10C
0x110
0x114
0x118
BD[31:0]
1
2
3
4
5
BWRITE
BTRAN[1:0]
BPROT[1:0]
A-TRAN
S-TRAN
11 or 01
S-TRAN
S-TRAN
S-TRAN
S-TRAN
A-TRAN
BURST[1:0]
00 = No burst or undefined burst length
ASTB
NCMAHB
Figure 6-7 Example nonbuffered STM
ARM DDI 0151C
Copyright © 2000, 2001 ARM Limited. All rights reserved.
6-15