Type 0 Configuration—Device Number To Idsel Translation - Motorola MPC8240 User Manual

PCI Bus Transactions
Table 7-6. Type 0 Configuration—Device Number to IDSEL Translation
Note that the MPC8240 must not issue PCI configuration transactions to itself (that is, for
PCI configuration transactions initiated by the MPC8240, its IDSEL input signal must not
be asserted).
For type 0 translations, the function number and register number fields are copied without
modification onto the AD[10:2] signals during the address phase. The AD[1:0] signals are
driven to 0b00 during the address phase for type 0 configuration cycles.
For systems implementing address map A on the MPC8240, there is an alternate method
for generating type 0 configuration cycles, called the direct access method. See
Section A.2, "Configuration Accesses Using Direct Method," for more information.
7-26
Device Number
Binary
0b0_0000–0b0_1001
0b0_1010
0b0_1011
0b0_1100
0b0_1101
0b0_1110
0b0_1111
0b1_0000
0b1_0001
0b1_0010
0b1_0011
0b1_0100
0b1_0101
0b1_0110
0b1_0111
0b1_1000
0b1_1001
0b1_1010
0b1_1011
0b1_1100
0b1_1101
0b1_1110
1
0b1_1111
1
A device number of all 1s indicates a PCI special-cycle or
interrupt-acknowledge transaction.
MPC8240 Integrated Processor User's Manual
IDSEL
Decimal
0–9 —
10 AD31
11 AD11
12 AD12
13 AD13
14 AD14
15 AD15
16 AD16
17 AD17
18 AD18
19 AD19
20 AD20
21 AD21
22 AD22
23 AD23
24 AD24
25 AD25
26 AD26
27 AD27
28 AD28
29 AD29
30 AD30
31 —