PCF2123BS/1,518 NXP Semiconductors, PCF2123BS/1,518 Datasheet - Page 25

• 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
Three examples are given for clearing the flags. Clearing the flags is made by a write
command, therefore bits 7, 6, 4, 1 and 0 must be written with their previous values.
Repeatedly re-writing these bits has no influence on the functional behavior.
Table 30.
Table
appropriate flag.
Table 31.
Table 32.
Table 33.
Clearing the alarm flag (bit AF) operates in exactly the same way, see
Register
Control_2
Register
Control_2
Register
Control_2
Register
Control_2
31,
Table 32
Flag location in register Control_2
Example to clear only TF (bit 2) in register Control_2
Example to clear only MSF (bit 5) in register Control_2
Example to clear both TF and MSF (bit 2 and bit 5) in register Control_2
Bit
7
-
Bit
7
-
Bit
7
-
Bit
7
-
All information provided in this document is subject to legal disclaimers.
and
Rev. 4 — 22 December 2010
Table 33
-
-
-
-
6
6
6
6
show what instruction must be sent to clear the
5
MSF
5
1
5
0
5
0
4
-
4
-
4
-
4
-
3
AF
3
1
3
1
3
1
SPI Real time clock/calendar
2
TF
2
0
2
1
2
0
Section
PCF2123
© NXP B.V. 2010. All rights reserved.
1
-
1
-
1
-
1
-
8.5.5.
0
-
0
-
0
-
0
-
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