Harry (13.11.2015 10:55, просмотров: 79) ответил Constantin24 на Точно не знаю, но мы вытащили одну батарейку, купили новую на пробу(проверили напряжение = 3V) и вставили ее в плату, прям из упаковки - результат тот же
А после установки батарейки девайс включали? Может в этих часиках схема похожа на RTC у LPC...
"3.18 VBAT.1: Increased power consumption on VBAT when VBAT is
powered before the 3.3 V supply used by rest of the device
Introduction:
The device has a VBAT pin which provides power only to the RTC and Battery RAM.
VBAT can be connected to a battery or the same 3.3 V supply used by rest of the device
(VDD(3V3) pin, VDD(DCDC)(3V3) pin).
Problem:
If VBAT is powered before the 3.3 V supply, VBAT is unable to source the start-up current
required for the Battery RAM. Therefore, power consumption on the VBAT pin will be high
and will remain high until 3.3 V supply is powered up. Once 3.3 V supply is powered up,
power consumption on the VBAT pin will reduce to normal and subsequent power cycle
on the 3.3 V supply will not cause an increased power consumption on the VBAT pin.
Work-around:
Provide 3.3 V supply used by rest of the device first and then provide VBAT voltage."
(с) errata.lpc2368.pdf
У нас батарейка вставляется в уже собранный девайс, после чего он сразу включается.