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Hardware Reference Manual for i.MX53 Quick Start
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5.2.
Dialog   DA9053   PMIC  
 
The ? Dialog ? PMIC ? provides ? all ? regulated ? power ? to ? the ? Quick ? Start ? board ? with ? the ? exception ? of ? a ?
supplemental ? 3.2V/1A ? voltage ? regulator. ? Physically, ? the ? PMIC ? is ? located ? in ? the ? upper ? right ? corner ? of ? the ?
Quick ? Start ? board, ? as ? close ? to ? the ? power ? connector ? as ? possible, ? while ? still ? maintaining ? room ? for ?
supporting ? components. ? From ? this ? location, ? power ? is ? supplied ? to ? the ? rest ? of ? the ? board. ?
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When ? 5V ? power ? is ? first ? attached ? to ? the ? Quick ? Start ? board, ? the ? PMIC ? will ? remain ? in ? an ? OFF ? state ? until ? the ?
POWER ? button ? is ? pressed. ? In ? the ? OFF ? state, ? the ? PMIC ? will ? generate ? power ? on ? the ? VDDOUT ? rail ? at ?
approximately ? 3.6V ? (different ? if ? Li ‐ ION ? battery ? attached) ? for ? use ? by ? the ? PMIC ? as ? a ? supply ? for ? all ?
regulators. ? In ? addition, ? the ? PMIC ? generates ? a ? VDDCORE ? voltage ? of ? 2.5V ? for ? internal ? PMIC ? use, ? and ? to ?
serve ? as ? a ? pull ‐ up ? source ? for ? the ? nONKEY/KEEPACT ? and ? nSHUTDOWN ? control ? inputs. ? This ? ensures ? that ?
these ? two ? button ? are ? active ? whenever ? power ? is ? available ? to ? the ? Quick ? Start ? boar. ?
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When ? the ? POWER ? button ? is ? initially ? pressed, ? the ? PMIC ? senses ? the ? Active ? Low ? signal ? on ? the ? nONKEY ? pin ?
and ? begins ? to ? power ? on ? all ? voltage ? rails ? in ? preprogrammed ? sequence. ? The ? sequence ? is ? determined ?
primarily ? by ? the ? order ? in ? which ? power ? must ? be ? supplied ? to ? the ? i.MX53 ? processor. ? Once ? the ? core ?
operations ? of ? the ? processor ? are ? fully ? powered, ? other ? power ? rails ? are ? turned ? on. ?
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The ? first ? voltage ? regulator ? to ? power ? on ? is ? always ? VLDO1. ? This ? regulator ? supplies ? a ? maximum ? of ? 40 ? mA ?
current ? at ? 1.3V ? and ? powers ? on ? only ? the ? Secure ? RTC ? module ? of ? the ? i.MX53 ? Processor. ? This ? turns ? on ? the ?
RTC ? Clock ? (32.768KHz) ? and ? Watch ? Dog ? features. ? In ? the ? event ? a ? System ? Reset ? is ? triggered, ? or ? the ? Quick ?
Start ? board ? is ? placed ? into ? Standby, ? VLDO1 ? will ? remain ? powered ? ON. ? The ? only ? time ? that ? VLDO1 ? will ? turn ?
off ? is ? if ? all ? power ? is ? removed ? from ? the ? Quick ? Start ? board, ? or ? if ? a ? software ? command ? is ? sent ? to ? the ? PMIC ? to ?
turn ? off ? VLDO1. ? In ? the ? case ? that ? a ? developer ? attaches ? an ? optional ? coin ? cell ? to ? JP1/JP2, ? the ? coin ? cell ? will ?
provide ? power ? to ? keep ? VLDO1 ? operating. ?
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The ? power ? sequence ? requirements ? for ? the ? i.MX53 ? Applications ? Processor ? from ? the ? data ? sheet ? are ? as ?
follows: ?
1. NVCC_SRTC_POW ? (VLDO1) ?
2. VCC, ? VDDA, ? VDDGP, ? VDD_REG ? [in ? any ? order] ?
3. All ? other ? supplies ? [in ? any ? order] ?
NOTE: ? in ? case ? the ? internal ? regulator ? is ? used ? for ? VDDA ? generation, ? the ? VDD_REG ? should ? be ? powered ? up ?
together ? with ? VCC ? and ? VDDGP, ? before ? the ? other ? supplies. ? In ? case ? the ? internal ? regulator ? is ? not ? used ? to ?
generate ? VDDA ? (as ? on ? the ? Quick ? Start ? board), ? the ? VDD_REG ? is ? independent ? and ? has ? no ? power ‐ up ?
restrictions. ?
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The ? power ? on ? timing ? sequence ? shown ? in ? Table ? 1 ? is ? the ? sequence ? programmed ? into ? the ? Dialog ? PMIC. ? It ? is ?
one ? way ? of ? providing ? sequences ? power ? to ? the ? i.MX53 ? processor. ? Designers ? are ? free ? to ? change ? the ? power ?
timing ? sequence ? on ? their ? own ? board ? designs ? as ? long ? as ? the ? timing ? requirements ? are ? met. ? Freescale ? has ?
not ? formally ? tested ? other ? power ? on ? timing ? sequences. ?
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Freescale Semiconductor
Hardware User Guide for i.MX53 Quick Start Board,
Preliminary Rev 0.91
31
PUBI – Public Use Business Information ?
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