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Question about the difference among Tiva C series MCU

Min-Ku Yeo
Intellectual 555 points
Other Parts Discussed in Thread: TM4C123GH6PM, TM4C123BH6PM, MSP430F135

Hi, I'm using two MCU of Tiva C series which are TM4C123BH6PM, TM4C123GH6PM.

I'm curious of the difference of these two.

(ref : TM4C123BH6PM datasheet page 1271)

Just looking at this page, it seems that the TM4C123BH6PM and the TM4C123GH6PM are almost the same to me.

They both are the ARM Cortex-M4F type and have the same memory size.

What are the difference of performance between these two (and other Tiva C series products)?

Does the TM4C123GH6PM MCU more stronger to noise etc?

+) Another question

I've also used MSP430F135 MCU.

Why does the MSP430 series have only one voltage supply pin and one GND pin,

on the other hand the ARM type MCU like Stellaris and Tiva C series has serveral VDD and GND pins?

Regards, Min-Ku

  • 0
    TI__Guru**** 244400 points

    Hello Min-Ku,

    The two devices have the Part Number designator 23B and 23G. These would have different features. In the Product Selection you would be able to see what features are different. The same applies for all TM4C products.

    Each device has a different requirement for number of supply pins based on the current requirement (one of the factors). Hence it would need larger number of VDD and GND pins to ensure that the power supply network of the device does not fail.

    Regards

    Amit

  • 0
    Guru 26105 points

    Hi,

    1) The difference is in presence of USB module: *BH6* part does not have an USB module, while *GH6* has one (OTG).

    Nothing different on noise, same.

    2) MSP430 is another class, 16 bits, 16MHz/25MHz, another architecture, easier problem(s) to solve.

    Petrei

  • 0 in reply to Petrei
    Guru 117855 points

    Having both Vdd & Vss "exit" the chip from, "all 4 sides" simplifies (and improves) the design routing w/in any sophisticated IC.  As frequencies increase - expect to see this technique expand...

    If you examine the gate/transistor count between that lesser performing MCU and an ARM M4 - the need for and advantage of such, "multiple power escapements" will reveal.

    Note: predecessor vendor's early MCU's (that firm was fabless) "set the record" for number of Vdd/Vss pins per MCU.  (and that produced the "worst ever" gpio/package - known to man...)