pcf2127a NXP Semiconductors, pcf2127a Datasheet - Page 79

• Manufacturer Part Number: pcf2127a
• Description: Integrated Rtc, Tcxo And Quartz Crystal
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8.13.7
8.14
8.15
9
9.1
9.1.1
9.2
9.2.1
9.2.2
9.2.3
9.2.4
9.2.5
10
11
12
12.1
12.2
13
13.1
13.2
14
15
16
17
18
19
20
20.1
20.2
20.3
20.4
21
22
23
24
Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . 61
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 62
Static characteristics. . . . . . . . . . . . . . . . . . . . 63
Dynamic characteristics . . . . . . . . . . . . . . . . . 68
Application information. . . . . . . . . . . . . . . . . . 71
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 72
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 73
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 74
Legal information. . . . . . . . . . . . . . . . . . . . . . . 75
Contact information. . . . . . . . . . . . . . . . . . . . . 75
Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
I
I
typical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
SPI-bus timing characteristics . . . . . . . . . . . . 68
I
Battery low detection interrupts . . . . . . . . . . . 49
External clock test mode . . . . . . . . . . . . . . . . 50
STOP bit function . . . . . . . . . . . . . . . . . . . . . . 51
SPI-bus interface . . . . . . . . . . . . . . . . . . . . . . 54
Data transmission . . . . . . . . . . . . . . . . . . . . . . 54
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
START and STOP conditions . . . . . . . . . . . . . 56
System configuration . . . . . . . . . . . . . . . . . . . 56
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 57
Current consumption I
Frequency characteristics. . . . . . . . . . . . . . . . 67
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 75
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 75
2
2
2
C-bus interface. . . . . . . . . . . . . . . . . . . . . . . 56
C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . 58
C interface timing characteristics . . . . . . . . . 70
DD
characteristics,
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2010.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [e-mail]
Integrated RTC, TCXO and quartz crystal
PCF2127A
Document identifier: PCF2127A_1
Date of release: 21 January 2010
All rights reserved.