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BD6081GU,BD6081GVW
● Explanation for operate
1. Reset
There are two kinds of reset, software reset and hardware reset.
(1) Software reset
? All the registers are initialized more than making a register (SFTRST) setup "1".
? The register of software resetting is an automatic return (Auto Return 0).
(2) Hardware reset
? It shifts to hardware reset by changing RESET pin “H” → “L”.
? The condition of all the registers under hardware reset pin is returned to the initial value,
and it stops accepting all address.
? It’s possible to release from a state of hardware reset by setting register “L” → “H”.
? RESET pin has delay circuit. It doesn’t recognize as hardware reset in “L” period under 5 μ s.
(3) Reset Sequence
? When hardware reset was done during software reset, software reset is canceled when
hardware reset is canceled. (Because the initial value of software reset is “0”)
2. Thermal shutdown
The blocks which thermal shutdown function is effective in the following.
Charge pump
LED Driver
REG1
REG2 is not shut down by thermal shutdown function, because REG2 can be used for I/O voltage.
A thermal shutdown function works in about 195 ℃ .
Detection temperature has a hysteresis, and detection release temperature is about 175 ℃ .
(Design reference value)
Technical Note
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? 2011 ROHM Co., Ltd. All rights reserved.
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2011.04 - Rev.A
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