mpc8250 Freescale Semiconductor, Inc, mpc8250 Datasheet - Page 29

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

4
This section provides the pin assignments and pinout list for the MPC8250.
4.1
The following figures and table represent the standard 480 TBGA package. For information on the
alternate package, refer to Section 4.2, “VR Package” on page 42.
Freescale Semiconductor
1
2
3
4
5
MODCK[1–
MODCK_H
1010_000
1010_001
1010_010
1010_011
1010_100
1011_000
1011_001
1011_010
1011_100
1011_011
Pinout
divided by 2 (33 instead of 66 MHz, etc.) and the CPM multiplication factor is multiplied by 2. Refer to
the resulting configuration does not exceed the frequency rating of the user’s part.
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
Core frequency = (60x bus frequency)(core multiplication factor)
Bus frequency = CPM frequency / bus division factor
In this mode, PCI_MODCK must be “1”.
ZU Package
3]
–
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
66/33 MHz
66/33 MHz
(PCI)
Table 18. Clock Configuration Modes in PCI Agent Mode (continued)
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
MPC8250 Hardware Specifications, Rev. 1
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
Frequency
106 MHz
106 MHz
106 MHz
106 MHz
106 MHz
60x Bus
88 MHz
88 MHz
88 MHz
88 MHz
88 MHz
Table 12
4
Pinout
29