Grant Whitacre
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Recent activity by Grant Whitacre-
Q&A: Is there anything special that I need to do when using a 32.768 kHz crystal to clock the Apollo3 B0?
Full question(s): Is there any special initialization that needs to be done when using a 32.768 kHz crystal to clock the Apollo3 Blue, revision B0? Answer(s): This only applies to Apollo3 B0 silico...
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Q&A: Is there an example showing how to use the CQ_RAW mode?
Full question(s): Is there an example showing how to use the CQ_RAW mode in MSPI to IOM transfers? (The CQ Raw feature enables pre-constructed CQ using the raw interface). Answer(s): Yes. See at...
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Q&A: Why am I getting a bus fault error when I run XIP code?
Full question(s): I am running execute-in-place (XIP) code with the MSPI module on the Apollo3 Blue, and I am experiencing bus fault errors. This fault is indicated in the core's BusFault Status R...
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Q&A: How to work around the incorrect CLKOUT settings in am_hal_clkgen_clkout_e?
Full question(s): The values in the enumeration am_hal_clkgen_clkout_e in SDK2.1.0 do not match Apollo3's datasheet 0.9.1. Thus the CLKOUT does not function as expected. How can this be worked ar...
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Apollo3 Blue Patching
This space explains Apollo3-Blue Patch application and includes information about the currently available patches and their application. Patch Descriptions # Patch Binary ...
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Q&A: What is the max STIMER clock and how is it selected?
Full question(s): What is the max STIMER clock and how is it selected? Is the max STIMER clock (F_HFRC/16 = 3 MHz) as described in Table 790 of the Apollo2 Datasheet also applicable when CTIMER...
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Q&A: How do you program OTP Flash on Apollo MCUs?
Full question(s): How do you program One-time-programmable (OTP) Flash on Apollo MCUs? Where can I find information about it? Are there HAL functions in the AmbiqSuite SDK for programming and re...
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Q&A: Do Ambiq RTCs prevent POR from occurring as part of its noise immunity?
Full question(s): I am concerned about the noise immunity of AM1805AQ and AM0805AQ. VCC drop causing POR is described on page 44 of AM18x5 Datasheet. High frequency noise (about 10 ns pulse) exis...
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Q&A: What are Apollo2's power supplies and domains?
Full question(s): Q&A: What are Apollo2's power supply inputs and what do they power internally? Answer(s): The diagram below shows all the input/output power domains for Apollo2. The three inp...
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Q&A: What is the difference between the BUSY and TXBUSY bits in the UART Flag Register?
The difference between the TXBUSY and BUSY bits is that the TXBUSY bit indicates that the UART is in the middle of a transmit operation and when it clears, the TXCMP bit is set. The TXBUSY bit is t...