Electronic Components Datasheet Search
  English  ▼

X  

Preview PDF HTML

PCF2123TS Datasheet(PDF) 35 Page - NXP Semiconductors

Part # PCF2123TS
Description  SPI Real time clock/calendar
PDF  54 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF2123TS Datasheet(HTML) 35 Page - NXP Semiconductors

Back Button PCF2123TS Datasheet HTML 31Page - NXP Semiconductors PCF2123TS Datasheet HTML 32Page - NXP Semiconductors PCF2123TS Datasheet HTML 33Page - NXP Semiconductors PCF2123TS Datasheet HTML 34Page - NXP Semiconductors PCF2123TS Datasheet HTML 35Page - NXP Semiconductors PCF2123TS Datasheet HTML 36Page - NXP Semiconductors PCF2123TS Datasheet HTML 37Page - NXP Semiconductors PCF2123TS Datasheet HTML 38Page - NXP Semiconductors PCF2123TS Datasheet HTML 39Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 35 / 54 page
background image
PCF2123_1
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 19 November 2008
35 of 54
NXP Semiconductors
PCF2123
SPI Real time clock/calendar
In Figure 24, the register Seconds is set to 45 seconds and the register Minutes is set to
10 minutes.
In Figure 25, the Months and Years registers are read. In this example, pins SDI and SDO
are not connected together. For this configuration, it is important that pin SDI is never left
floating. It must always be driven either HIGH or LOW. If pin SDI is left open, high IDD
currents may result. Short transition periods in the order of 200 ns will not cause any
problems.
Table 42.
Command byte definition
Bit
Symbol
Value
Description
7R/W
data read or data write selection
0
write data
1
read data
6 to 4 SA
001
subaddress; other codes will cause the device to ignore
data transfer
3 to 0
RA
0h to Fh
register address range
Fig 24. Serial bus write example
001aaf915
xx
address
counter
CE
SDI
SCL
02
03
04
seconds data 45BCD
minutes data 10BCD
R/W
addr 02HEX
b7
0
b6
0
b5
0
b4
1
b3
0
b2
0
b1
1
b0
0
b7
0
b6
1
b5
0
b4
0
b3
0
b2
1
b1
0
b0
1
b7
0
b6
0
b5
0
b4
1
b3
0
b2
0
b1
0
b0
0



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com