Datasheet

MPC8260A PowerQUICC™ II Integrated Communications Processor Hardware Specifications, Rev. 2.0
30 Freescale Semiconductor
Clock Configuration Modes
Table 19 describes all possible clock configurations when using the MPC8265 or the MPC8266’s internal
PCI bridge in agent mode.
100 66/33 MHz 3/6 200 MHz 3 240 MHz 2.5 80 MHz
101 66/33 MHz 3/6 200 MHz 3.5 280 MHz 2.5 80 MHz
110 66/33 MHz 4/8 266 MHz 3.5 300 MHz 3 88 MHz
111 66/33 MHz 4/8 266 MHz 3 300 MHz 2.5 100 MHz
1
Assumes MODCK_HI = 0000.
2
The frequency depends on the value of PCI_MODCK. If PCI_MODCK is high (logic ‘1’), the PCI frequency is divided
by 2 (33 instead of 66 MHz, etc.) and the CPM multiplication factor is multiplied by 2. Refer to Table 1 5.
3
Core frequency = (60x bus frequency)(core multiplication factor)
4
Bus frequency = CPM frequency/bus division factor
Table 19. Clock Configuration Modes in PCI Agent Mode
MODCK_H –
MODCK[1–3]
Input Clock
Frequency
(PCI)
1,2
CPM
Multiplication
Factor
1
CPM
Frequency
Core
Multiplication
Factor
Core
Frequency
3
Bus Division
Factor
60x Bus
Frequency
4
0001_001 66/33 MHz 2/4 133 MHz 5 166 MHz 4 33 MHz
0001_010 66/33 MHz 2/4 133 MHz 6 200 MHz 4 33 MHz
0001_011 66/33 MHz 2/4 133 MHz 7 233 MHz 4 33 MHz
0001_100 66/33 MHz 2/4 133 MHz 8 266 MHz 4 33 MHz
0010_001 50/25 MHz 3/6 150 MHz 3 180 MHz 2.5 60 MHz
0010_010 50/25 MHz 3/6 150 MHz 3.5 210 MHz 2.5 60 MHz
0010_011 50/25 MHz 3/6 150 MHz 4 240 MHz 2.5 60 MHz
0010_100 50/25 MHz 3/6 150 MHz 4.5 270 MHz 2.5 60 MHz
0011_000 66/33 MHz 2/4 133 MHz 2.5 110MHz 3 44 MHz
0011_001 66/33 MHz 2/4 133 MHz 3 132 MHz 3 44 MHz
0011_010 66/33 MHz 2/4 133 MHz 3.5 154 MHz 3 44 MHz
0011_011 66/33 MHz 2/4 133 MHz 4 176MHz 3 44 MHz
0011_100 66/33 MHz 2/4 133 MHz 4.5 198 MHz 3 44 MHz
0100_000 66/33 MHz 3/6 200 MHz 2.5 166 MHz 3 66 MHz
0100_001 66/33 MHz 3/6 200 MHz 3 200 MHz 366 MHz
0100_010 66/33 MHz 3/6 200 MHz 3.5 233 MHz 366 MHz
0100_011 66/33 MHz 3/6 200 MHz 4 266 MHz 366 MHz
Table 18. Clock Default Configurations in PCI Agent Mode (MODCK_HI = 0000) (continued)
MODCK[1–3]
1
Input Clock
Frequency
(PCI)
2
CPM
Multiplication
Factor
2
CPM
Frequency
Core
Multiplication
Factor
Core
Frequency
3
Bus Division
Factor
60x Bus
Frequency
4