RV-3049 datasheet(31/65 Pages) MICROCRYSTAL

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Micro Crystal

DTCXO Temperature Compensated Real Time Clock / Calendar Module

RV-3049

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4.4.1.TIMER INTERRUT

The generation of Interrupts from the Countdown Timer function is enabled by “TIE” = “1” (bit 1 in register

Control_INT). If Timer Interrupt is enabled by “TIE” = “1”, the Timer Flag “TF” (bit 1 in register Control_INT Flag) will

be set = “1” at the end of every Timer countdown.

The Interrupt signal INT follows the condition of Timer Flag “TF” (bit 1 in register Control_INT Flag), the Timer Flag

“TF” and the Interrupt signal ( INT ) remain set until cleared by software writing “TF” = “0”.

Timer Interrupt Control (addresses 01h / 02h…bits description)

Address

Function

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

01h

Control_INT

SRIE

V2IE

V1IE

TIE

AIE

bit 1

TIE

TF is disabled, no Timer Interrupt generated

TF is enabled, Timer Interrupt generated when Countdown Timer value

reaches zero and TF is set “1”

02h

Control_INT Flag

SRF

V2IF

V1IF

bit 1

No Timer Interrupt generated

Timer Flag is set “1” when TIE is enabled and Countdown Timer value

reaches zero, TF needs to be cleared to clear INT

Bit positions labelled as “X” are not implemented and will return a “0” when read.

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