MPC826XACVR datasheet(29/52 Pages) FREESCALE

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MPC8260A PowerQUICC™ II Integrated Communications Processor Hardware Specifications, Rev. 1.1

Freescale Semiconductor

Clock Configuration Modes

3.2.2

PCI Agent Mode

The frequencies listed in Table 18 and Table 19 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.

1001_001

66 MHz

3.5

233 MHz

200 MHz

4/8

58/29 MHz

1001_010

66 MHz

3.5

233 MHz

3.5

233 MHz

4/8

58/29 MHz

1001_011

66 MHz

3.5

233 MHz

266 MHz

4/8

58/29 MHz

1001_100

66 MHz

3.5

233 MHz

4.5

300 MHz

4/8

58/29 MHz

1010_000

100 MHz

200 MHz

3/6

66/33 MHz

1010_001

100 MHz

200 MHz

2.5

250 MHz

3/6

66/33 MHz

1010_010

100 MHz

200 MHz

300 MHz

3/6

66/33 MHz

1010_011

100 MHz

200 MHz

3.5

350 MHz

3/6

66/33 MHz

1010_100

100 MHz

200 MHz

400 MHz

3/6

66/33 MHz

1011_000

100 MHz

2.5

250 MHz

200 MHz

4/8

62/31 MHz

1011_001

100 MHz

2.5

250 MHz

2.5

250 MHz

4/8

62/31MHz

1011_010

100 MHz

2.5

250 MHz

300 MHz

4/8

62/31 MHz

1011_011

100 MHz

2.5

250 MHz

3.5

350 MHz

4/8

62/31 MHz

1011_100

100 MHz

2.5

250 MHz

400 MHz

4/8

62/31 MHz

Notes:

1. 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.

2. 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.). Refer to Table 15.

3. In this mode, PCI_MODCK must be “0”.

Table 18. Clock Default Configurations in PCI Agent Mode (MODCK_HI = 0000)

MODCK[1–3]

(1)

Input Clock

Frequency

(PCI)2

CPM

Multiplication

Factor(2)

CPM

Frequency

Core

Multiplication

Factor

Core

Frequency

(3)

Bus Division

Factor

60x Bus

Frequency

(4)

000

66/33 MHz

2/4

133 MHz

2.5

166 MHz

66 MHz

001

66/33 MHz

2/4

133 MHz

200 MHz

66 MHz

010

66/33 MHz

3/6

200 MHz

66 MHz

011

66/33 MHz

3/6

200 MHz

266 MHz

66 MHz

Table 17. Clock Configuration Modes in PCI Host Mode (continued)

MODCK_H –

MODCK[1–3]

Input Clock

Frequency(1)

(Bus)

CPM

Multiplication

Factor

CPM

Frequency

Core

Multiplication

Factor

Core

Frequency

PCI Division

Factor(2)

PCI

Frequency2

MPC826XACVR Datasheet(PDF) 29 Page - Freescale Semiconductor, Inc

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