PCF2123BS/1,518 NXP Semiconductors, PCF2123BS/1,518 Datasheet - Page 16

• 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
8.4.7 Register Years
8.4.8 Setting and reading the time
Table 16.
Table 17.
Figure 10
Month
Bit
7 to 4
3 to 0
January
February
March
April
May
June
July
August
September
October
November
December
Fig 10. Data flow of the time function
Symbol
YEARS
shows the data flow and data dependencies starting from the 1 Hz clock tick.
Month assignments in BCD format
Years - years register (08h) bit description
Upper-digit
(ten’s place)
Bit 4
0
0
0
0
0
0
0
0
0
1
1
1
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 22 December 2010
12_24 hour mode
CALCULATION
LEAP YEAR
Digit (unit place)
Bit 3
0
0
0
0
0
0
0
1
1
0
0
0
Value
0 to 9
0 to 9
SECONDS
MINUTES
MONTHS
1 Hz tick
HOURS
YEARS
DAYS
Bit 2
0
0
0
1
1
1
1
0
0
0
0
0
Place value Description
ten’s place
unit place
WEEKDAY
actual year coded in BCD format
SPI Real time clock/calendar
001aaf901
Bit 1
0
1
1
0
0
1
1
0
0
0
0
1
PCF2123
© NXP B.V. 2010. All rights reserved.
Bit 0
1
0
1
0
1
0
1
0
1
0
1
0
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