ARM ARM7TDMI - Data Types

Open Access
Expanding and Monitoring the ASB
4-8
ARM Development Board (ARM7TDMI Version)
Hardware Reference Guide
ARM DUI 0017C
4.4 ASB Timing on the ARM Development Board
The AMBA specification does not specify bus timing, as this depends upon the technology
used. For expansion on the ARM Development Board, it is important to have some timing
guidelines. To assist with this, the following timings have been defined:
Figure 4-4: ASB timings on the ARM Development Board
Ttr
Taca
Tacw
Tacs
Tacp
Tsel
Tsrw
Tsrl
Tsre
Tdata
0ns 25ns 50ns 75ns 100ns 125ns 150ns
B_CLK
B_TRAN[1:0]
B_A[31:0]
B_WRITE
B_SIZE[1:0]
B_PROT[1:0]
D_SEL
B_WAIT
B_LAST
B_ERROR
B_D[31:0]
hrg.book Page 8 Wednesday, July 22, 1998 9:18 AM