MPC8260A Motorola, MPC8260A Datasheet - Page 26

• Manufacturer Part Number: MPC8260A
• Description: Micro Processor
• Manufacturer: Motorola

Clock Configuration Modes
Table 19 describes all possible clock configurations when using the MPC8265A or the MPC8266A’s
internal PCI bridge in agent mode.
26
1
2
3
4
5
MODCK[1–3]
The user should verify that all buses and functions run frequencies that are within the supported ranges.
Assumes MODCK_HI = 0000.
The frequency depends on the value of PCI_MODCK. If PCI_MODCK is high (logic ‘1’), the PCI frequency is
Core frequency = (60x bus frequency)(core multiplication factor)
Bus frequency = CPM frequency / bus division factor
MODCK[1–3]
MODCK_H –
divided by 2 (33 instead of 66 MHz, etc.) and the CPM multiplication factor is multiplied by 2.
Table 18. Clock Default Configurations in PCI Agent Mode (MODCK_HI = 0000)
0001_001
0001_010
0001_011
0001_100
0010_001
0010_010
0010_011
0010_100
0011_000
0011_001
0011_010
0011_011
0011_100
0100_000
0100_001
0100_010
0100_011
100
101
110
111
2
Input Clock
Frequency
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
50/25 MHz
50/25 MHz
50/25 MHz
50/25 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
Input Clock
Frequency
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
(PCI)
(PCI)
2,3
Table 19. Clock Configuration Modes in PCI Agent Mode
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
3
MPC826xA (HiP4) Family Hardware Specifications
Multiplication
Multiplication
Factor
Factor
CPM
2/4
2/4
2/4
2/4
3/6
3/6
3/6
3/6
2/4
2/4
2/4
2/4
2/4
3/6
3/6
3/6
3/6
CPM
3/6
3/6
4/8
4/8
2
3
Frequency
Frequency
133 MHz
133 MHz
133 MHz
133 MHz
150 MHz
150 MHz
150 MHz
150 MHz
133 MHz
133 MHz
133 MHz
133 MHz
133 MHz
200 MHz
200 MHz
200 MHz
200 MHz
200 MHz
200 MHz
266 MHz
266 MHz
CPM
CPM
Multiplication
Multiplication
Factor
Core
Factor
3.5
4.5
2.5
3.5
4.5
2.5
3.5
Core
5
6
7
8
3
4
3
4
3
4
3.5
3.5
3
3
Frequency
Frequency
166 MHz
200 MHz
233 MHz
266 MHz
180 MHz
210 MHz
240 MHz
270 MHz
132 MHz
154 MHz
198 MHz
166 MHz
200 MHz
233 MHz
266 MHz
110MHz
176MHz
240 MHz
280 MHz
300 MHz
300 MHz
Core
Core
4
4
Bus Division
Bus Division
Factor
1
Factor
2.5
2.5
2.5
2.5
4
4
4
4
3
3
3
3
3
3
3
3
3
2.5
2.5
2.5
3
1
(Continued)
Frequency
MOTOROLA
Frequency
60x Bus
33 MHz
33 MHz
33 MHz
33 MHz
60 MHz
60 MHz
60 MHz
60 MHz
44 MHz
44 MHz
44 MHz
44 MHz
44 MHz
66 MHz
66 MHz
66 MHz
66 MHz
100 MHz
60x Bus
80 MHz
80 MHz
88 MHz
5
5