battery connections for RTC
Posted: Mon Feb 11, 2013 1:33 am
> The LPC does not have any special VCC BAT inputs, how do you keep just the RTC
alive? do you just keep power on the VCC18 cpu core? using a little battery?
>
> How does the LPC2106 know to go into idle mode when the normal power is taken
away?
>
> The datasheet/user manual does not seam to explain any of this
>
The LPC2106 is one of the first ARMs that NXP designed. It does not have a
battery domain, so to keep its RTC running requires power to the whole part.
The LPC2103 was designed later and added the battery domain, just for the RTC.
It wasn't until the more recent parts that even a small RAM with battery backup
was added (not the whole RAM)
alive? do you just keep power on the VCC18 cpu core? using a little battery?
>
> How does the LPC2106 know to go into idle mode when the normal power is taken
away?
>
> The datasheet/user manual does not seam to explain any of this
>
The LPC2106 is one of the first ARMs that NXP designed. It does not have a
battery domain, so to keep its RTC running requires power to the whole part.
The LPC2103 was designed later and added the battery domain, just for the RTC.
It wasn't until the more recent parts that even a small RAM with battery backup
was added (not the whole RAM)