PCF8563 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 11 — 26 October 2015 7 of 45
NXP Semiconductors
PCF8563
Real-time clock/calendar
8.3 Control registers
8.3.1 Register Control_status_1
[1] Default value.
[2] Bits labeled as N should always be written with logic 0.
8.3.2 Register Control_status_2
Alarm registers
09h Minute_alarm AE_M MINUTE_ALARM (0 to 59)
0Ah Hour_alarm AE_H x HOUR_ALARM (0 to 23)
0Bh Day_alarm AE_D x DAY_ALARM (1 to 31)
0ChWeekday_alarmAE_WxxxxWEEKDAY_ALARM (0 to 6)
CLKOUT control register
0DhCLKOUT_controlFExxxxxFD[1:0]
Timer registers
0EhTimer_controlTExxxxxTD[1:0]
0Fh Timer TIMER[7:0]
Table 4. Formatted registers overview
…continued
Bit positions labelled as x are not relevant. Bit positions labelled with N should always be written with logic 0; if read they
could be either logic 0 or logic 1. After reset, all registers are set according to Table 27.
Address Register name Bit
7 6 5 4 3 2 1 0
Table 5. Control_status_1 - control and status register 1 (address 00h) bit description
Bit Symbol Value Description Reference
7 TEST1 0
[1]
normal mode
must be set to logic 0 during normal operations
Section 8.9
1 EXT_CLK test mode
6N 0
[2]
unused
5STOP0
[1]
RTC source clock runs Section 8.10
1 all RTC divider chain flip-flops are asynchronously set to logic 0; the RTC
clock is stopped (CLKOUT at 32.768 kHz is still available)
4N 0
[2]
unused
3 TESTC 0 Power-On Reset (POR) override facility is disabled; set to logic 0 for
normal operation
Section 8.11.1
1
[1]
Power-On Reset (POR) override may be enabled
2to0 N 000
[2]
unused
Table 6. Control_status_2 - control and status register 2 (address 01h) bit description
Bit Symbol Value Description Reference
7to5 N 000
[1]
unused
4TI_TP0
[2]
INT is active when TF is active (subject to the status of TIE) Section 8.3.2.1
and
Section 8.8
1INT pulses active according to Table 7 (subject to the status of TIE);
Remark: note that if AF and AIE are active then INT
will be
permanently active