AB08X5 Real-Time Clock Family

Date of Issue: October 16, 2014

3.0 x 3.0 mm

Page 8 of 33

Abracon Drawing #453567

Revision: C

FOUT/nIRQ

Primary interrupt output connection. This pin is an open drain output. An external pull-up resistor must

be added to this pin. It should be connected to the host device and is used to indicate when the RTC

can be accessed via the serial interface. FOUT/nIRQ may be configured to generate several signals as

a function of the OUT1S field(see 0x11 - Control2). FOUT/nIRQ is also asserted low on a power up

until the AB08X5 has exited the reset state and is accessible via the I/O interface.

1. FOUT/nIRQ can drive the value of the OUT bit.

2. FOUT/nIRQ can drive the inverse of the combined interrupt signal IRQ (see Interrupts).

3. FOUT/nIRQ can drive the square wave output (see 0x13 - SQW) if enabled by SQWE.

4. FOUT/nIRQ can drive the inverse of the alarm interrupt signal AIRQ (see Interrupts).

nIRQ2

1. Secondary interrupt output connection. It is an open drain output. This pin can be left floating if not

used. nIRQ2 may be configured to generate several signals as a function of the OUT2S field (see

0x11 - Control2). nIRQ2 can drive the value of the OUTB bit.

2. nIRQ2 can drive the square wave output (see 0x13 - SQW) if enabled by SQWE.

3. nIRQ2 can drive the inverse of the combined interrupt signal IRQ(see Interrupts).

4. nIRQ2 can drive the inverse of the alarm interrupt signal AIRQ(see Interrupts).

5. nIRQ2 can drive either sense of the timer interrupt signal TIRQ.

nTIRQ (only available in

Timer interrupt output connection. It is an open drain output. nTIRQ always drives the active low nTIRQ

signal. If this pin is used, an external pull-up resistor must be added to this pin. If the pin is not used, it

can be left floating.

Table 3: Pin Descriptions

Pin Name

Description