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Electrical Characteristics
MPC5646C Microcontroller Datasheet, Rev. 4
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
45
Most of the time for the applications, PI/O< PINT and may be neglected. On the other hand, PI/O may be significant, if the device
is configured to continuously drive external modules and/or memories.
An approximate relationship between PD and TJ (if PI/O is neglected) is given by:
PD = K / (TJ + 273 °C)
Eqn. 2
K = PD (TA + 273 °C) + RJA PD
2
Eqn. 3
Where:
K is a constant for the particular part, which may be determined from Equation 3 by measuring PD (at equilibrium)
for a known TA. Using this value of K, the values of PD and TJ may be obtained by solving equations 1 and 2
iteratively for any value of TA.
4.6
I/O pad electrical characteristics
4.6.1
I/O pad types
The device provides four main I/O pad types depending on the associated alternate functions:
Slow pads—These pads are the most common pads, providing a good compromise between transition time and low
electromagnetic emission.
Medium pads—These pads provide transition fast enough for the serial communication channels with controlled
current to reduce electromagnetic emission.
Fast pads—These pads provide maximum speed. These are used for improved Nexus debugging capability.
Input only pads—These pads are associated to ADC channels and 32 kHz low power external crystal oscillator
providing low input leakage.
Low power pads—These pads are active in standby mode for wakeup source.
Also, medium/slow and fast/medium pads are available in design which can be configured to behave like a slow/medium and
medium/fast pads depending upon the slew-rate control.
Medium and fast pads can use slow configuration to reduce electromagnetic emission, at the cost of reducing AC performance.
4.6.2
I/O input DC characteristics
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MPC5646CF0VLU1R | 32-BIT, FLASH, 120 MHz, MICROCONTROLLER, PQFP176 |
| MPC5646CF0CLU1R | 32-BIT, FLASH, 120 MHz, MICROCONTROLLER, PQFP176 |
| MPC5646CF0MLT8R | 32-BIT, FLASH, 80 MHz, MICROCONTROLLER, PQFP208 |
| MPC5646CCF0VLT8R | 32-BIT, FLASH, 80 MHz, MICROCONTROLLER, PQFP208 |
| MPC5646CCF0CLU8 | 32-BIT, FLASH, 80 MHz, MICROCONTROLLER, PQFP176 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPC564AADPT176 | 功能描述:開發(fā)板和工具包 - 其他處理器 ANDORRA ADAPT RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| MPC564AADPT208 | 制造商:Freescale Semiconductor 功能描述:ANDORRA ADAPSOLDERED |
| MPC564AKIT176 | 功能描述:開發(fā)板和工具包 - 其他處理器 ANDORRA 176QFP KIT RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| MPC564AKIT176S | 制造商:Freescale Semiconductor 功能描述:MPC564XA 176 LQFP SOCKET EVAL KIT 制造商:Freescale Semiconductor 功能描述:MPC564XA, 176 LQFP SOCKET, EVAL KIT |
| MPC564AKIT208 | 制造商:Freescale Semiconductor 功能描述:ANDORRA 208BGA KIT |
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