MPC8260 Freescale Semiconductor, Inc, MPC8260 Datasheet - Page 32

• Manufacturer Part Number: MPC8260
• Description: Mpc8260 Powerquicc Ii Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

Clock Configuration Modes
32
Notes:
MODCK[1–3]
MODCK_H –
1. 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
2. Input clock frequency is given only for the purpose of reference. User should set MODCK_H–MODCK_L so that
the resulting configuration does not exceed the frequency rating of the user’s part.
3. Core frequency = (60x bus frequency)(core multiplication factor)
4. Bus frequency = CPM frequency / bus division factor
5. In this mode, PCI_MODCK must be “1”.
1010_000
1010_001
1010_010
1010_011
1010_100
1011_000
1011_001
1011_010
1011_011
1011_100
MPC8260A PowerQUICC™ II Integrated Communications Processor Hardware Specifications, Rev. 1.1
Input Clock
Frequency
Table 19. Clock Configuration Modes in PCI Agent Mode (continued)
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
66/33 MHz
(PCI)
(1),(2)
Multiplication
Factor
CPM
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
1
Frequency
266 MHz
266 MHz
266 MHz
266 MHz
266 MHz
266 MHz
266 MHz
266 MHz
266 MHz
266 MHz
CPM
Multiplication
Factor
Core
2.5
3.5
4.5
2.5
3.5
3
4
2
3
4
Frequency
222 MHz
266 MHz
300 MHz
350 MHz
400 MHz
265 MHz
318 MHz
371 MHz
424 MHz
212MHz
Core
(3)
Bus Division
Factor
2.5
2.5
2.5
2.5
2.5
3
3
3
3
3
Freescale Semiconductor
Frequency
106 MHz
106 MHz
106 MHz
106 MHz
106 MHz
60x Bus
Table
88 MHz
88 MHz
88 MHz
88 MHz
88 MHz
(4)
15.