參數(shù)資料
型號: MPC8255ACVVMHBB
廠商: Freescale Semiconductor
文件頁數(shù): 16/50頁
文件大?。?/td> 0K
描述: IC MPU POWERQUICC II 480-TBGA
標準包裝: 21
系列: MPC82xx
處理器類型: 32-位 MPC82xx PowerQUICC II
速度: 266MHz
電壓: 2V
安裝類型: 表面貼裝
封裝/外殼: 480-LBGA
供應商設備封裝: 408-TBGA(37.5x37.5)
包裝: 托盤
MPC8260A PowerQUICC II Integrated Communications Processor Hardware Specifications, Rev. 2.0
Freescale Semiconductor
23
Clock Configuration Modes
3
Clock Configuration Modes
To configure the main PLL multiplication factor and the core, CPM, and 60x bus frequencies, the
MODCK[1–3] pins are sampled while HRESET is asserted. Table 13 lists the eight basic configuration
modes. Table 14 lists the other modes that are available by using the configuration pin (RSTCONF) and
driving four bits from hardware configuration word on the data bus.
Note that the MPC8265 and the MPC8266 have two additional clocking modes—PCI agent and PCI host.
NOTE
Clock configurations change only after POR is asserted.
3.1
Local Bus Mode
Table 13 describes default clock modes for the MPC826xA.
Table 14 describes all possible clock configurations when using the hard reset configuration sequence.
Note that basic modes are shown in boldface type. 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.
Table 13. Clock Default Modes
MODCK[1–3]
Input Clock
Frequency
CPM Multiplication
Factor
CPM
Frequency
Core Multiplication
Factor
Core
Frequency
000
33 MHz
3
100 MHz
4
133 MHz
001
33 MHz
3
100 MHz
5
166 MHz
010
33 MHz
4
133 MHz
4
133 MHz
011
33 MHz
4
133 MHz
5
166 MHz
100
66 MHz
2
133 MHz
2.5
166 MHz
101
66 MHz
2
133 MHz
3
200 MHz
110
66 MHz
2.5
166 MHz
2.5
166 MHz
111
66 MHz
2.5
166 MHz
3
200 MHz
Table 14. Clock Configuration Modes1
MODCK_H–MODCK[1–3]
Input Clock
Frequency2,3
CPM Multiplication
Factor2
CPM
Frequency2
Core Multiplication
Factor2
Core
Frequency2
0001_000
33 MHz
2
66 MHz
4
133 MHz
0001_001
33 MHz
2
66 MHz
5
166 MHz
0001_010
33 MHz
2
66 MHz
6
200 MHz
0001_011
33 MHz
2
66 MHz
7
233 MHz
0001_100
33 MHz
2
66 MHz
8
266 MHz
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