PCF85263AT datasheet(21/100 Pages) NXP

21 / 100 page

PCF85263A

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4.1 — 27 November 2015

21 of 100

NXP Semiconductors

PCF85263A

Tiny RTC with alarm, battery switch-over, and I2C-bus

[1]

Default value.

8.4.1.3

Alarm1 and alarm2 function in RTC mode

The registers at addresses 08h through 0Ch contain alarm1 information. When one or

more of these registers is loaded with second, minute, hour, day, or month, and its

corresponding alarm enable bit (SEC_A1E to MON_A1E) is set logic 1, then that

information is compared with the current second, minute, hour, day, and month.

The registers at addresses 0Dh through 0Fh contain alarm2 information. When one or

more of these registers is loaded with minute, hour or weekday, and its corresponding

alarm enable bit (MIN_A2E to WDAY_A2E) is set logic 1, then that information is

compared with the current minute, hour and weekday.

Alarm registers which have their alarm enable bit at logic 0 are ignored.

When the time increments to match the enabled alarms, the alarm flag in the Flags

flag is cleared by command.

When the time increments to match the enabled alarms, an interrupt can be generated.

See Section 8.4.3 “Alarm interrupts”.

MIN_A1E

minute alarm1 enable

0[1]

disabled

enabled

SEC_A1E

second alarm1 enable

0[1]

disabled

enabled

Table 14.

Alarm_enables- alarm enable control register (address 10h) bit

description …continued

Bit

Symbol

Value

Description

PCF85263AT Datasheet(PDF) 21 Page - NXP Semiconductors

PCF85263AT Datasheet(HTML) 21 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

Datasheet Download

Link URL