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BD6081GU,BD6081GVW
6. About the start of REG2 (the voltage for I/O)
It must start as follows when REG2 output is used as VIO voltage.
VBAT (force)
RESET
(external pin control)
REG2EN
(external pin control)
Min ： 7.5ms (*2)
REG2MD
(external pin control)
REG2O （ output ）
(=VIO voltage)
Low current
Min ： 0ms (*4)
Technical Note
Stand By
consumption mode
Normal mode
Stand By
ド
Register access is possible (*3)
Min ： 2ms(*2)
(*1) This sequence is when REG2O is used as an I/O voltage.
Take the specifications of the outside power supply into consideration when the I/O voltage is applied from outside.
(*2) When the low consumption mode is unnecessary, REG2EN=REG2MD (simultaneous control) is possible.
But, at that case as well, REG2 rising time in the normal mode Take a (Min : 2ms) into consideration.
(*3) REG2 should go for a release of RESET at the time of the normal mode.
(*4) REG2EN= Though "L" and RESET= "L" don't care even about the simultaneous timing,
It is prohibition to take REG2EN= "L" in front of RESET= "L".
It must start as follows when external power supply is used as VIO voltage.
VBAT （ force ）
VIO （ force ）
RESET （ external pin control ）
Register control
Impossible
Possible
Impossible
VIO should go for a release of RESET after the time of the rising mode.
And it is forbid to fall VIO before RESET=”L”.
7. About the pin management of the function that isn't used and test pins
Please connect the pin that isn’t used and test pin referred to equivalent circuit (P.8).
TESTI1, TESTI2 ? ? ? ? ? ? Short to GND (Must) because input pin for test
TESTO1, TESTO2 ? ? ? ? ? ? Be OPEN because output for test
T1~T4
? ? ? ? ? ? Short to GND (Must) because input pin for test
Non-used LED Pin ? ? ? ? Short to GND
But, the setup of a register concerned with LED that isn’t used is prohibited.
REG2EN, REG2MD, RGB1CNT, RGB2CNT ? ? ? ? ? ? Pull-Down resistance is built in.
Short to GND
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2011.04 - Rev.A
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