LPC MicrocontrollersのトピックRe: Power-Down and External Reset Issue

Power-Down and External Reset Issue

lpcware — Wed, 15 Jun 2016 17:49:03 GMT

Content originally posted in LPCWare by silex on Fri Feb 20 07:32:14 MST 2015
Hello,

I could make LPC1754 to get into Power-Down mode, but although it is not stated in its user manual, a signal on External Reset pin causes mcu to wake-up. I would like to know if it is usual. If not, how can i prevent wake up from external reset signal?

Thank you.

Re: Power-Down and External Reset Issue

lpcware — Wed, 15 Jun 2016 17:49:04 GMT

Content originally posted in LPCWare by nerd herd on Fri Feb 20 11:38:42 MST 2015
Hi Silex,

Asserting an external reset signal while in a low power mode will reset the MCU, this is typical. I believe the external reset pin is all hardware controlled meaning there is no way to "disable" it.

Re: Power-Down and External Reset Issue

lpcware — Wed, 15 Jun 2016 17:49:05 GMT

Content originally posted in LPCWare by R2D2 on Fri Feb 20 13:03:27 MST 2015

Quote: silex
...but although it is not stated in its user manual

:quest:

UM10360 Table 73:

Quote:
RESET 14 I
External reset input: [color=#f00]A LOW-going pulse as short as 50 ns on this pin resets the
device[/color], causing I/O ports and peripherals to take on their default states, and
processor execution to begin at address 0. TTL with hysteresis, 5 V tolerant.