RV-3029 Datasheet, PDF (34/67 Pages) MICORO CRYSTAL SWITZERLAND – DTCXO Temperature Compensated Real Time Clock

Micro Crystal
DTCXO Temperature Compensated Real Time Clock / Calendar Module
RV-3029
4.6. INTERRUPT OUTPUT INT
An active LOW Interrupt signal is available at INT pin.
The INT is an open-drain output and requires a pull-up resistor to V_DD.
Interrupts may be sourced from five places:
• Alarm function
• Countdown Timer function
• V_LOW1 detection
• V_LOW2 detection
• System Reset function
All Interrupt signals follow the condition of their corresponding flags in the bits 0 to 4 of register Control_INT Flag at
address 02h.
Alarm Interrupt:
Generation of Interrupts from the Alarm function is enabled via “AIE” = “1” (bit 0 in register Control_INT). If “AIE” is
enabled, the INT pin follows the condition of Flag “AF” (bit 0 in register Control_INT Flag). To clear Interrupt signal
( INT ), the corresponding flag “AF” needs to be cleared by writing = “0”, clearing “AF” will immediately clear INT .
Timer Interrupt:
Generation of Interrupts from the Countdown Timer is enabled via “TIE” = “1” (bit 1 in register Control_INT). If “TIE”
is enabled, the INT pin follows the condition of Flag “TF” (bit 1 in register Control_INT Flag). To clear Interrupt
signal ( INT ), the corresponding flag “TF” needs to be cleared by writing = “0”, clearing “TF” will immediately clear
INT .
V_LOW1 Interrupt:
Generation of Interrupts from the Voltage Low 1 detection is enabled via “V1IE” = “1” (bit 2 in register Control_INT).
If “V1IE” is enabled, the INT pin follows the condition of Flag “V1IF” (bit 2 in register Control_INT Flag). To clear
Interrupt signal ( INT ), both corresponding flags “V1IF” (bit 2 in register Control_INT Flag) and “V1F” (bit 2 in
register Control_Status) need to be cleared by writing = “0”.
V_LOW2 Interrupt:
Generation of Interrupts from the Voltage Low 2 detection is enabled via “V2IE” = “1” (bit 3 in register Control_INT).
If “V2IE” is enabled, the INT pin follows the condition of Flag “V2IF” (bit 3 in register Control_INT Flag). To clear
Interrupt signal ( INT ), both corresponding flags “V2IF” (bit 3 in register Control_INT Flag) and “V2F” (bit 3 in
register Control_Status) need to be cleared by writing = “0”.
System Reset Interrupt:
Generation of Interrupts from the System Reset function is enabled via “SRIE” = “1” (bit 4 in register Control_INT).
If “SRIE” is enabled, the INT pin follows the condition of Flag “SRF” (bit 4 in register Control_INT Flag). To clear
Interrupt signal ( INT ), both corresponding flags “SRF” (bit 4 in register Control_INT Flag) and “SR” (bit 4 in register
Control_Status) need to be cleared by writing = “0”.
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