Hi, I’m hoping for some advice on pull-up resistor values as they apply to the DS1305 real time clock with two programmable alarms.
Background on device: I am trying to create a solar powered audio system in the woods that will turn on at a specific time in the morning and turn off at a specific time at night. I am using a bi-stable two-coil relay (V23079) to control the power to the audio output. The first alarm set on the RTC should switch the relay on, allowing power to the audio device; the second alarm on the RTC should switch the relay off, cutting power to the audio device.
Problem: The alarms are firing in code and seemingly on the RTC; however the power is not being held from the INT1(Interrupt 1 - pin 7) and INT0 (Interrupt 0 - pin 6) on the RTC. I was not able to find the following information in the datasheet: How long does the alarm interrupt last; or does it stay on and you have to deactivate it? In addition, what should the value of the R1 pull-up resistor in the diagram from the datasheet?
Background on device: I am trying to create a solar powered audio system in the woods that will turn on at a specific time in the morning and turn off at a specific time at night. I am using a bi-stable two-coil relay (V23079) to control the power to the audio output. The first alarm set on the RTC should switch the relay on, allowing power to the audio device; the second alarm on the RTC should switch the relay off, cutting power to the audio device.
Problem: The alarms are firing in code and seemingly on the RTC; however the power is not being held from the INT1(Interrupt 1 - pin 7) and INT0 (Interrupt 0 - pin 6) on the RTC. I was not able to find the following information in the datasheet: How long does the alarm interrupt last; or does it stay on and you have to deactivate it? In addition, what should the value of the R1 pull-up resistor in the diagram from the datasheet?