mpc8260aec Freescale Semiconductor, Inc, mpc8260aec Datasheet - Page 27

• Manufacturer Part Number: mpc8260aec
• Description: Mpc826xa Hip4 Family Hardware
• Manufacturer: Freescale Semiconductor, Inc

1.3.2.2
The frequencies listed in Table 17 and Table 18 are for the purpose of illustration only. Users must select a
mode and input bus frequency so that the resulting configuration does not exceed the frequency rating of the
user’s device.
Table 18 describes all possible clock configurations when using the MPC8265 or the MPC8266’s internal
PCI bridge in agent mode.
MOTOROLA
1
2
3
4
MODCK[1–3]
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. Refer to
Table 14.
0001_001
0001_010
0001_011
0001_100
0010_001
0010_010
0010_011
0010_100
0011_000
0011_001
000
001
010
011
100
101
110
111
Table 17. Clock Default Configurations in PCI Agent Mode (MODCK_HI = 0000)
PCI Agent Mode
1
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
Input Clock
Frequency
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
(PCI)
(PCI)
1,2
Table 18. Clock Configuration Modes in PCI Agent Mode
2
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
CPM
2/4
2/4
3/6
3/6
3/6
3/6
4/8
4/8
1
2
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
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
Core
5
6
7
8
3
4
3
2.5
3.5
3.5
3
3
4
3
3
Frequency
Frequency
166 MHz
200 MHz
233 MHz
266 MHz
180 MHz
210 MHz
240 MHz
270 MHz
132 MHz
110MHz
166 MHz
200 MHz
200 MHz
266 MHz
240 MHz
280 MHz
300 MHz
300 MHz
Core
Core
Clock Configuration Modes
3
3
Bus Division
Bus Division
Factor
Factor
2.5
2.5
2.5
2.5
4
4
4
4
3
3
2.5
2.5
2.5
2
2
3
3
3
Frequency
Frequency
60x Bus
33 MHz
33 MHz
33 MHz
33 MHz
60 MHz
60 MHz
60 MHz
60 MHz
44 MHz
44 MHz
100 MHz
60x Bus
66 MHz
66 MHz
66 MHz
66 MHz
80 MHz
80 MHz
88 MHz
4
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