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| 型号： | MC8641DVU1333JB |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 166.66 MHz, MICROPROCESSOR, CBGA1023 |
| 封装： | 33 X 33 MM, ROHS COMPLIANT, CERAMIC, BGA-1023 |
| 文件页数： | 25/130页 |
| 文件大小： | 1493K |
| 代理商： | MC8641DVU1333JB |
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MPC8641 and MPC8641D Integrated Host Processor Hardware Specifications, Rev. 2
120
Freescale Semiconductor
System Design Information
Local Bus - If parity is not used, tie LDP[0:3] to ground via a 4.7 k
Ω resistor, tie LPBSE to OVDD
via a 4.7 k
Ω resistor (pull-up resistor). For systems which boot from Local Bus (GPCM)-controlled
flash, a pullup on LGPL4 is required.
SerDes - Receiver lanes configured for PCI Express are allowed to be disconnected (as would
occur when a PCI Express slot is connected but not populated). Directions for terminating the
SerDes signals is discussed in Section 20.5.1, “Guidelines for High-Speed Interface Termination.”
20.5.1
Guidelines for High-Speed Interface Termination
20.5.1.1
SerDes Interface
The high-speed SerDes interface can be disabled through the POR input cfg_io_ports[0:3] and through the
DEVDISR register in software. If a SerDes port is disabled through the POR input the user can not enable
it through the DEVDISR register in software. However, if a SerDes port is enabled through the POR input
the user can disable it through the DEVDISR register in software. Disabling a SerDes port through
software should be done on a temporary basis. Power is always required for the SerDes interface, even if
the port is disabled through either mechanism. Table 72 describes the possible enabled/disabled scenarios
for a SerDes port. The termination recommendations must be followed for each port.
If the high-speed SerDes port requires complete or partial termination, the unused pins should be
terminated as described in this section.
The following pins must be left unconnected (floating):
SDn_TX[7:0]
Table 72. SerDes Port Enabled/Disabled Configurations
Disabled through POR input
Enabled through POR input
Enabled through DEVDISR
SerDes port is disabled (and cannot be
enabled through DEVDISR)
Complete termination required
(Reference Clock not required)
SerDes port is enabled
Partial termination may be required1
(Reference Clock is required)
1 Partial Termination when a SerDes port is enabled through both POR input and DEVDISR is determined by the
SerDes port mode. If the port is in x8 PCI Express mode, no termination is required because all pins are being used.
If the port is in x1/x2/x4 PCI Express mode, termination is required on the unused pins. If the port is in x4 Serial
RapidIO mode termination is required on the unused pins.
Disabled through DEVDISR
SerDes port is disabled (through POR
input)
Complete termination required
(Reference Clock not required)
SerDes port is disabled after software
disables port
Same termination requirements as when
the port is enabled through POR input2
(Reference Clock is required)
2 If a SerDes port is enabled through the POR input and then disabled through DEVDISR, no hardware changes are
required. Termination of the SerDes port should follow what is required when the port is enabled through both POR
input and DEVDISR. See Note 1 for more information.
Notes:
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC8641DVU1333JC | 功能描述:微处理器 - MPU G8 REV 2.1 1.05V 105C RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MC8641DVU1333JE | 功能描述:微处理器 - MPU G8 REV3.0 1.05V 105C RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MC8641DVU1333K | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MC8641DVU1333N | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MC8641DVU1500G | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
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