参数资料
型号: MPC8260AVVPIBB
厂商: Freescale Semiconductor
文件页数: 19/50页
文件大小: 0K
描述: IC MPU POWERQUICC II 480-TBGA
标准包装: 21
系列: MPC82xx
处理器类型: 32-位 MPC82xx PowerQUICC II
速度: 300MHz
电压: 2V
安装类型: 表面贴装
封装/外壳: 480-LBGA
供应商设备封装: 408-TBGA(37.5x37.5)
包装: 托盘
配用: MPC8260ADS-TCOM-ND - BOARD DEV ADS POWERQUICC II
MPC8260A PowerQUICC II Integrated Communications Processor Hardware Specifications, Rev. 2.0
26
Freescale Semiconductor
Clock Configuration Modes
3.2
PCI Mode
The MPC8265 and the MPC8266 have three clocking modes: local, PCI host, and PCI agent. The clocking
mode is set according to three input pins—PCI_MODE, PCI_CFG[0], PCI_MODCK—as shown in
In addition, note the following:
NOTE: PCI_MODCK
In PCI mode only, PCI_MODCK comes from the LGPL5 pin and
MODCK_H[0–3] comes from {LGPL0, LGPL1, LGPL2, LGPL3}.
NOTE: Tval (Output Hold)
The minimum Tval = 2 when PCI_MODCK = 1, and the minimum Tval = 1
when PCI_MODCK = 0. Therefore, designers should use clock
configurations that fit this condition to achieve PCI-compliant AC timing.
NOTE
Clock configurations change only after POR is asserted.
1000_001
66 MHz
3.5
233 MHz
3
200 MHz
1000_010
66 MHz
3.5
233 MHz
3.5
233 MHz
1000_011
66 MHz
3.5
233 MHz
4
266 MHz
1000_100
66 MHz
3.5
233 MHz
4.5
300 MHz
1 Because of speed dependencies, not all of the possible configurations in Table 14 are applicable.
2 The user should choose the input clock frequency and the multiplication factors such that the frequency of the CPU
is equal to or greater than 150 MHz and the CPM ranges between 66–233 MHz.
3 Input clock frequency is given only for the purpose of reference. The user should set MODCK_H–MODCK_L so that
the resulting configuration does not exceed the frequency rating of the user’s part.
Table 15. MPC8265 and MPC8266 Clocking Modes
Pins
Clocking Mode
PCI Clock
Frequency Range
(MHZ)
PCI_MODE
PCI_CFG[0]
PCI_MODCK
1
Local bus
0
PCI host
50–66
0
1
25–50
0
1
0
PCI agent
50–66
0
1
25–50
Table 14. Clock Configuration Modes1 (continued)
MODCK_H–MODCK[1–3]
Input Clock
Frequency2,3
CPM Multiplication
Factor2
CPM
Frequency2
Core Multiplication
Factor2
Core
Frequency2
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