Datasheet > 56F84540VLF

56F84540VLF

更新时间： 2022-09-22 09:42:10

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		/
页数	文件大小	规格书
67页	993K
描述
MC56F8455x Advance

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56F84540VLF 数据手册

Obtaining package dimensions

• Using separate power planes for V_DDand V_DDAand separate ground planes for V_SS

and VSSA are recommended. Connect the separate analog and digital power and

ground planes as near as possible to power supply outputs. If an analog circuit and

digital circuit are powered by the same power supply, you should connect a small

inductor or ferrite bead in serial with V_DDAand V_SSAtraces.

• Physically separate analog components from noisy digital components by ground

planes. Do not place an analog trace in parallel with digital traces. Place an analog

ground trace around an analog signal trace to isolate it from digital traces.

• Because the flash memory is programmed through the JTAG/EOnCE port, SPI, SCI,

or I²C, the designer should provide an interface to this port if in-circuit flash

programming is desired.

• If desired, connect an external RC circuit to the RESET pin. The resistor value

should be in the range of 4.7 kΩ–10 kΩ; the capacitor value should be in the range of

0.22 µF–4.7 µF.

• Configuring the RESET pin to GPIO output in normal operation in a high-noise

environment may help to improve the performance of noise transient immunity.

• Add a 2.2 kΩ external pullup on the TMS pin of the JTAG port to keep EOnCE in a

restate during normal operation if JTAG converter is not present.

• During reset and after reset but before I/O initialization, all I/O pins are at tri-state.

• To eliminate PCB trace impedance effect, each ADC input should have a no less than

33 pF 10Ω RC filter.

10 Obtaining package dimensions

Package dimensions are provided in package drawings.

To find a package drawing, go to http://www.freescale.com and perform a keyword

search for the drawing’s document number:

Drawing for package

48-pin LQFP

Document number to be used

98ASH00962A

64-pin LQFP

98ASS23234W

11 Pinout

MC56F8455x Advance Information Data Sheet, Rev. 2, 06/2012.

Freescale Semiconductor, Inc.

Preliminary

General Business Information

1...58 59 606162 63 64...67

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