PCF2123BS/1,518 NXP Semiconductors, PCF2123BS/1,518 Datasheet - Page 15

• Manufacturer Part Number: PCF2123BS/1,518
• Description: IC RTC/CALENDAR SPI BUS 16HVQFN
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/Alarmr

Specifications of PCF2123BS/1,518

• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 1.1 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-VQFN Exposed Pad, 16-HVQFN, 16-SQFN, 16-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 935286382518

NXP Semiconductors
PCF2123
Product data sheet
8.4.4 Register Days
8.4.5 Register Weekdays
8.4.6 Register Months
Table 12.
[1]
Table 13.
Table 14.
[1]
Table 15.
Bit
7 to 6
5 to 4
3 to 0
Bit
7 to 3
2 to 0
Day
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Bit
7 to 5
4
3 to 0
The PCF2123 compensates for leap years by adding a 29th day to February if the year counter contains a
value which is exactly divisible by 4, including the year 00.
Definition may be re-assigned by the user.
[1]
Symbol
-
DAYS
Symbol
-
WEEKDAYS
Symbol
-
MONTHS
Days - days register (address 05h) bit description
Weekdays - weekdays register (address 06h) bit description
Weekday assignments
Months - months register (address 07h) bit description
[1]
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 22 December 2010
Bit
2
0
0
0
0
1
1
1
Value
-
0 to 3
0 to 9
Value
-
0 to 6
Value
-
0 to 1
0 to 9
1
0
0
1
1
0
0
1
Place value Description
-
ten’s place
unit place
Description
unused
actual weekday values, see
Place value Description
-
ten’s place
unit place
unused
actual day coded in BCD format
unused
actual month coded in BCD
format, see
SPI Real time clock/calendar
0
0
1
0
1
0
1
0
Table 16
PCF2123
Table 14
© NXP B.V. 2010. All rights reserved.
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