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Hardware Reference Manual for i.MX53 Quick Start
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11.
Known   Issues  
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At ? the ? initial ? launching ? of ? the ? Quick ? Start ? board, ? the ? following ? issues ? are ? known ? to ? exist: ?
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1) SATA ? boot ? will ? not ? function ? with ? the ? sample ? grade ? i.MX53 ? ICs ? (rev ? 2.0 ? prototype ? silicon). ? The ?
problem ? is ? an ? IC ? problem ? related ? to ? using ? the ? internal ? SATA ? clock. ? Since ? the ? external ? clock ?
components ? have ? been ? removed ? from ? the ? Quick ? Start ? board, ? the ? SATA ? boot ? feature ? is ? not ?
usable. ? The ? work ? around ? is ? to ? initialize ? SATA ? with ? minimum ? code ? on ? a ? microSD ? card, ? then ? pass ?
the ? boot ? process ? to ? the ? SATA ? drive ? early. ? This ? problem ? is ? being ? fixed ? with ? the ? rev ? 2.1 ? production ?
silicon ? i.MX53 ? Processor. ?
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2) There ? is ? a ? defect ? in ? the ? Video ? Processing ? Unit ? (VPU) ? of ? the ? i.MX53 ? Processor ? (rev ? 2.0). ? The ?
defect ? causes ? the ? DDR3 ? SDRAM ? to ? miscalculate ? some ? blocks ? in ? video ? processing ? resulting ? in ?
defects ? observable ? on ? the ? video ? output ? in ? high ? processing ? modes ? (1080p). ? This ? defect ? is ? being ?
corrected ? on ? the ? rev ? 2.1 ? production ? silicon ? i.MX53 ? processor. ? For ? initial ? production ? Quick ? Start ?
boards, ? the ? VCC ? voltage ? is ? being ? raised ? to ? 1.35V ? to ? allow ? the ? VPU ? to ? process ? without ? errors. ? On ?
rev ? 2.1 ? silicon, ? VCC ? will ? be ? returned ? to ? 1.3V ? (by ? removing ? the ? software ? patch). ? This ? is ? not ? a ?
recommended ? solution ? for ? customer ? use, ? but ? is ? sufficient ? for ? development ? work ? on ? the ? Quick ?
Start ? board. ?
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3) The ? Dialog ? DA9053 ? PMIC ? rev ? AA ? silicon ? has ? a ? 1.2A ? limitation ? of ? the ? VDDOUT ? supply ? rail. ? This ? is ?
the ? voltage ? supply ? for ? all ? the ? PMIC ? regulators. ? The ? i.MX53 ? demonstration ? software ? is ? drawing ?
close ? to ? the ? 1.2A ? limit, ? and ? at ? times, ? voltage ? dips ? occur ? on ? the ? VDDOUT ? supply ? rail ? as ? the ? Quick ?
Start ? board ? tries ? to ? draw ? more ? power ? than ? the ? PMIC ? can ? supply. ? This ? has ? led ? to ? some ? abrupt ?
shutdowns ? in ? the ? testing ? cycle, ? as ? VDDOUT ? dips ? down ? below ? the ? allowed ? threshold. ? When ? it ?
becomes ? available, ? the ? DA9053 ? rev ? BB ? silicon ? will ? increase ? the ? current ? limit ? to ? 1.8A. ? For ? the ?
initial ? Quick ? Start ? boards, ? a ? 220 ? uF ? capacitor ? has ? been ? placed ? across ? JP19 ? pin2 ? and ? JP2 ? to ?
smooth ? out ? sudden ? momentary ? drops ? in ? voltage. ? In ? addition, ? a ? MicroElectronics ? STTH2L06 ? has ?
been ? soldered ? from ? the ? 5V_Main ? (Anode) ? to ? JP19 ? pin2 ? (Cathode) ? to ? provide ? a ? direct ? current ?
path ? outside ? the ? normal ? PMIC ? switcher. ? For ? this ? reason, ? the ? switcher ? L13 ? inductor ? has ? been ?
removed ? from ? these ? boards, ? preventing ? their ? use ? with ? an ? attached ? battery. ? This ? fix ? is ? only ? being ?
used ? for ? the ? preliminary ? rev ? AA ? silicon. ? All ? boards ? affected ? with ? this ? modification ? (in ? addition ? to ?
having ? an ? obvious ? capacitor ? and ? diode) ? are ? labeled ? “700 ‐ 26565 ? Rev ? D” ?
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Freescale Semiconductor
Hardware User Guide for i.MX53 Quick Start Board,
Preliminary Rev 0.91
95
PUBI – Public Use Business Information ?
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