PT7C43190 Datasheet, PDF(16/32 Page) Pericom Semiconductor Corporation

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9.Alarm and Interrupt Output

9.1. INT Pin Output Mode

These are selectable for the INT pin output mode;

Alarm 1 interrupt, alarm 2 interrupt, the output of user-set frequency, per-minute edge interrupt output, and minute-periodical

interrupt output 1 and 2, 32.768 kHz output. In alarm 1 interrupt / output of frequency; set data in the INT register 1. In alarm 2

interrupt, set data in the INT register 2. To switch the output mode, use the status register 2. Refer to "Status register 2" in

"Configuration of Registers". When switching the output mode, be careful of the output status of the pin. Especially, when using

alarm interrupt / output of frequency, switch the output mode after setting "00h" in the INT register 1 or 2. Alarm 2 interrupt is

dependent from other modes. Regardless of other settings of mode if alarm 2 interrupt was generated, be careful that "L" is output

from the INT pin. In 32.768 kHz output / per-minute edge interrupt output / minute-periodical interrupt output, it is unnecessary to

set data in the INT register 1 or 2 for users. Refer to the followings regarding each operation of output modes.

a. Alarm Interrupt Output

Alarm interrupt output is the function to output "L" from the INT pin, at the alarm time which is set by user has come. If setting

the pin output to "H", turn off the alarm function by setting "0" in INT1AE / INT2AE in the status register 2. To set the alarm time,

set the data of day of the week, hour, minute in the INT register 1 or 2, set the data of year, month, and day in the INT register 1 or

2. Refer to "INT register 1 and INT register 2" in "Configuration of Register".

ï¬ Alarm setting of "W (day of the week), H (hour), m (minute)"

*1. If users clear INT1AE / INT2AE once; "L" is not output from the INT pin by setting INT1AE / INT2AE enable again, within a

period when the alarm time matches real-time data.

Alarm Interrupt Output Timing

2015-09-0015

PT0274-7 10/16/15

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