PCF8563PN NXP Semiconductors, PCF8563PN Datasheet - Page 9

• Manufacturer Part Number: PCF8563PN
• Description: Real Time Clock ULTRA LOW POWER CLOCK CALENDAR
• Manufacturer: NXP Semiconductors

Specifications of PCF8563PN

• Function: Clock, Calendar, Alarm, Timer Interrupt
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Serial
• Package / Case: PDIP-8
• Time Format: HH:MM:SS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PCF8563P/F4,112

NXP Semiconductors
PCF8563
Product data sheet
8.4.1.1 Voltage-low detector and clock monitor
8.4.1 Register VL_seconds
8.4 Time and date registers
The majority of the registers are coded in the BCD format to simplify application use.
Table 8.
[1]
Table 9.
The PCF8563 has an on-chip voltage-low detector (see
V
information is no longer guaranteed. The VL flag can only be cleared by using the
interface.
Bit
7
6 to 4 SECONDS 0 to 5
3 to 0
Seconds value
(decimal)
00
01
02
:
09
10
:
58
59
Fig 7.
low
Start-up value.
, bit VL in the VL_seconds register is set to indicate that the integrity of the clock
Symbol
VL
Voltage-low detection
VL_seconds - seconds and clock integrity status register (address 02h) bit
description
Seconds coded in BCD format
All information provided in this document is subject to legal disclaimers.
Value
0
1
0 to 9
Upper-digit (ten’s place)
Bit 6
0
0
0
:
0
0
:
1
1
[1]
Rev. 8 — 18 November 2010
V
V
DD
low
Place value Description
-
-
ten’s place
unit place
Bit 5
0
0
0
:
0
0
:
0
0
period of battery
operation
Bit 4
0
0
0
:
0
1
:
1
1
clock integrity is guaranteed
integrity of the clock information is not guaranteed
actual seconds coded in BCD format, see
VL set
Digit (unit place)
Bit 3
0
0
0
:
1
0
:
1
1
normal power
operation
Figure
mgr887
t
Bit 2
0
0
0
:
0
0
:
0
0
7). When V
Real-time clock/calendar
Bit 1
0
0
1
:
0
0
:
0
0
PCF8563
© NXP B.V. 2010. All rights reserved.
DD
drops below
Table 9
0
1
0
1
0
0
1
Bit 0
:
:
9 of 45