Figure 11-14 Data Format, Ram1 Read; Figure 11-15 Rd Format, Ram2 Write And Data Format, Ram2 Read; Table 11-8 Access Permission Bit Setting; Table 11-9 Miss And Fault Encoding - Epson ARM720T Core Cpu Manual

In Figure 11-13, AP[3:0] determines the setting of the access permission bits for a memory
region. The allowed values are shown in Table 11-8.
Figure 11-14 shows the data format for RAM1 reads.
31
Prot fault
In Figure 11-14, bits [24:22] are only valid for a match operation. In this case the values shown
in Table 11-9 apply.
Prot fault
0
0
1
1
-
Figure 11-15 shows the Rd format for RAM2 writes, and the data format for RAM2 reads.
31
FCSE PID

Figure 11-15 Rd format, RAM2 write and data format, RAM2 read

ARM720T CORE CPU MANUAL

Table 11-8 Access permission bit setting

AP[3:0] Access permission bits
b1000 b11
b0100 b10
b0010 b01
b0001 b00
25 24 23 22 21
SBZ DOMAIN (one hot encoding)
D15
Domain fault
TLB miss

Figure 11-14 Data format, RAM1 read

Table 11-9 Miss and fault encoding

Domain fault TLB miss
0 0
1 0
0 0
1 0
- 1
25 24
Function
Hit, OK
Hit, domain fault
Hit, protection fault
Hit, protection and domain fault
TLB miss
UNP/SBZ
EPSON
11: Test Support
6 5 4 3 0
AP
D0
nC
nB
00
11-11