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参数资料
| 型号： | MPC8536AVTANGA |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 800 MHz, MICROPROCESSOR, PBGA783 |
| 封装： | 29 X 29 MM, 2.80 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, FCBGA-783 |
| 文件页数： | 22/127页 |
| 文件大小： | 1893K |
| 代理商： | MPC8536AVTANGA |
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MPC8536E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 3
JTAG Configuration Signals
Freescale Semiconductor
118
level puts the device into the default state and external resistors are needed only when non-default settings are required by the
user.
Careful board layout with stubless connections to these pull-down resistors coupled with the large value of the pull-down
resistor should minimize the disruption of signal quality or speed for output pins thus configured.
The platform PLL ratio and e500 PLL ratio configuration pins are not equipped with these default pull-up devices.
3.10
JTAG Configuration Signals
Correct operation of the JTAG interface requires configuration of a group of system control pins as demonstrated in Figure 78.
Care must be taken to ensure that these pins are maintained at a valid deasserted state under normal operating conditions as most
have asynchronous behavior and spurious assertion will give unpredicatable results.
Boundary-scan testing is enabled through the JTAG interface signals. The TRST signal is optional in the IEEE 1149.1
specification, but it is provided on all processors built on Power Architecture technology. The device requires TRST to be
asserted during power-on reset flow to ensure that the JTAG boundary logic does not interfere with normal chip operation.
While the TAP controller can be forced to the reset state using only the TCK and TMS signals, generally systems assert TRST
during the power-on reset flow. Simply tying TRST to HRESET is not practical because the JTAG interface is also used for
accessing the common on-chip processor (COP), which implements the debug interface to the chip.
The COP function of these processors allow a remote computer system (typically, a PC with dedicated hardware and debugging
software) to access and control the internal operations of the processor. The COP interface connects primarily through the JTAG
port of the processor, with some additional status monitoring signals. The COP port requires the ability to independently assert
HRESET or TRST in order to fully control the processor. If the target system has independent reset sources, such as voltage
monitors, watchdog timers, power supply failures, or push-button switches, then the COP reset signals must be merged into
these signals with logic.
The arrangement shown in Figure 78 allows the COP port to independently assert HRESET or TRST, while ensuring that the
target can drive HRESET as well.
The COP interface has a standard header, shown in Figure 79, for connection to the target system, and is based on the 0.025"
square-post, 0.100" centered header assembly (often called a Berg header). The connector typically has pin 14 removed as a
connector key.
The COP header adds many benefits such as breakpoints, watchpoints, register and memory examination/modification, and
other standard debugger features. An inexpensive option can be to leave the COP header unpopulated until needed.
There is no standardized way to number the COP header; consequently, many different pin numbers have been observed from
emulator vendors. Some are numbered top-to-bottom then left-to-right, while others use left-to-right then top-to-bottom, while
still others number the pins counter clockwise from pin 1 (as with an IC). Regardless of the numbering, the signal placement
recommended in Figure 79 is common to all known emulators.
3.10.1
Termination of Unused Signals
If the JTAG interface and COP header will not be used, Freescale recommends the following connections:
TRST should be tied to HRESET through a 0 k
Ω isolation resistor so that it is asserted when the system reset signal
(HRESET) is asserted, ensuring that the JTAG scan chain is initialized during the power-on reset flow. Freescale
recommends that the COP header be designed into the system as shown in Figure 78. If this is not possible, the
isolation resistor will allow future access to TRST in case a JTAG interface may need to be wired onto the system in
future debug situations.
No pull-up/pull-down is required for TDI, TMS, or TDO.
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相关代理商/技术参数 |
参数描述 |
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| MPC8536AVTAQG | 功能描述:微处理器 - MPU 8536 COMMERCIAL 1000 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 |
| MPC8536AVTAQGA | 功能描述:微处理器 - MPU 8536 Non E 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 |
| MPC8536AVTATH | 功能描述:微处理器 - MPU 8536 COMMERCIAL 1250 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 |
| MPC8536AVTATHA | 功能描述:微处理器 - MPU 8536 Non E 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 |
| MPC8536AVTATLA | 功能描述:微处理器 - MPU 8536 NON E 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 |
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