mpc8250 Freescale Semiconductor, Inc, mpc8250 Datasheet - Page 26

• Manufacturer Part Number: mpc8250
• Description: Mpc8250 Powerquicc Ii Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

Clock Configuration Modes
3.2.2
The frequencies listed 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.
26
1
2
3
MODCK[1–3]
MODCK[1–
MODCK_H
1001_010
1001_011
1001_100
1010_000
1010_001
1010_010
1010_011
1010_100
1011_000
1011_001
1011_010
1011_100
1011_011
the resulting configuration does not exceed the frequency rating of the user’s part.
divided by 2 (33 instead of 66 MHz, etc.). Refer to
Input clock frequency is given only for the purpose of reference. User should set MODCK_H–MODCK_L so that
The frequency depends on the value of PCI_MODCK. If PCI_MODCK is high (logic ‘1’), the PCI frequency is
In this mode, PCI_MODCK must be “0”.
3]
000
001
010
011
–
PCI Agent Mode
Table 17. Clock Default Configurations in PCI Agent Mode (MODCK_HI = 0000)
1
Frequency
Input Clock
Input Clock
100 MHz
100 MHz
100 MHz
100 MHz
100 MHz
100 MHz
100 MHz
100 MHz
100 MHz
100 MHz
Frequency
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66 MHz
66 MHz
66 MHz
Table 16. Clock Configuration Modes in PCI Host Mode (continued)
(Bus)
(PCI)
2
1
Multiplication
Multiplication
Factor
Factor
CPM
CPM
MPC8250 Hardware Specifications, Rev. 1
3.5
3.5
3.5
2.5
2.5
2.5
2.5
2.5
2/4
2/4
3/6
3/6
2
2
2
2
2
2
Frequency
Frequency
133 MHz
133 MHz
200 MHz
200 MHz
233 MHz
233 MHz
233 MHz
200 MHz
200 MHz
200 MHz
200 MHz
200 MHz
250 MHz
250 MHz
250 MHz
250 MHz
250 MHz
CPM
CPM
Table 12
Multiplication
Multiplication
Factor
Factor
Core
Core
2.5
3.5
4.5
2.5
3.5
2.5
3.5
3
3
4
4
2
3
4
2
3
4
Frequency
Frequency
166 MHz
200 MHz
200 MHz
266 MHz
233 MHz
266 MHz
300 MHz
200 MHz
250 MHz
300 MHz
350 MHz
400 MHz
200 MHz
250 MHz
300 MHz
350 MHz
400 MHz
Core
Core
3
PCI Division
Bus Division
Factor
Factor
4/8
4/8
4/8
3/6
3/6
3/6
3/6
3/6
4/8
4/8
4/8
4/8
4/8
2
2
3
3
Freescale Semiconductor
2
Frequency
Frequency
58/29 MHz
58/29 MHz
58/29 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
66/33 MHz
62/31 MHz
62/31 MHz
62/31 MHz
62/31 MHz
62/31MHz
60x Bus
66 MHz
66 MHz
66 MHz
66 MHz
PCI
2
4