參數(shù)資料
型號(hào)： MPC8255ACVRIFBX
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 200 MHz, RISC PROCESSOR, PBGA516
封裝： PLASTIC, BGA-516
文件頁數(shù)： 19/52頁
文件大?。?/td> 884K
代理商： MPC8255ACVRIFBX
MPC8260A PowerQUICC II Integrated Communications Processor Hardware Specifications, Rev. 1.1
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
Notes:
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 than150 MHz and the CPM ranges between 66–233 MHz.
3. 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.
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 Modes(1) (continued)
MODCK_H–MODCK[1–3]
Input Clock
Frequency(2)
,(3)
CPM Multiplication
Factor2
CPM
Frequency2
Core Multiplication
Factor2
Core
Frequency2
相關(guān)PDF資料
PDF描述
MPC8264AZUNJDX 32-BIT, 291 MHz, RISC PROCESSOR, PBGA480
MPC8265ACVRMIBX 32-BIT, 266 MHz, RISC PROCESSOR, PBGA516
MPC8266ACVRLHDX 32-BIT, 250 MHz, RISC PROCESSOR, PBGA516
MPC8266AZUNJDX 32-BIT, 291 MHz, RISC PROCESSOR, PBGA480
MPC8265AZUIFBX 32-BIT, 200 MHz, RISC PROCESSOR, PBGA480
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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MPC8255ACZUMIBB 功能描述:微處理器 - MPU POWER QUICC II HIP4B RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MPC8255AVVMHBB 功能描述:微處理器 - MPU PQ II HIP4 REV B RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
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