DS3234 Real-Time Clock Module - Revision history

Admin: /* DS3234 with Teensy 3.0 test */

2013-06-04T09:56:26Z

DS3234 with Teensy 3.0 test

← Older revision		Revision as of 09:56, 4 June 2013
Line 71:		Line 71:

	==DS3234 with Teensy 3.0 test ==		==DS3234 with Teensy 3.0 test ==
	[[File:Ds3234 test.jpg]]		[[File:Ds3234 test.jpg\|400px]]

	[[File:Ds3234 screenshot.png]]		[[File:Ds3234 screenshot.png\|400px]]

	==Example code==		==Example code==

Admin at 09:56, 4 June 2013

2013-06-04T09:56:07Z

← Older revision		Revision as of 09:56, 4 June 2013
Line 69:		Line 69:

	[[File:DS3234 com.jpg\|300px]]		[[File:DS3234 com.jpg\|300px]]

			==DS3234 with Teensy 3.0 test ==
			[[File:Ds3234 test.jpg]]

			[[File:Ds3234 screenshot.png]]

	==Example code==		==Example code==

Admin at 03:39, 9 June 2012

2012-06-09T03:39:34Z

← Older revision		Revision as of 03:39, 9 June 2012
Line 72:		Line 72:
	==Example code==		==Example code==

	[DS3234 Real-Time Clock example]		[http://www.geeetech.com/Documents/DS3234_example.pde DS3234 Real-Time Clock example]

	==Document==		==Document==
	[DS3234 Real-Time datasheet]		[http://www.geeetech.com/Documents/DS3234%20datasheet.pdf DS3234 Real-Time datasheet]

	==How to buy==		==How to buy==
	Click here to buy [DS3234 Real-Time Clock Module]		Click here to buy [http://www.geeetech.com/rtc-ds3234-breakout-p-540.html DS3234 Real-Time Clock Module]

Admin at 02:36, 9 June 2012

2012-06-09T02:36:10Z

@@ Line 68: / Line 68: @@
 After uploading the sketch, in the serial monitor of the Arduino IDE, we can read the real time.
-[[File:DS3234 com.jpg|450px]]
+[[File:DS3234 com.jpg|300px]]
 ==Example code==
- #include <SPI.h>
- const int  cs=8; //chip select
+[DS3234 Real-Time Clock example]
 ==Document==
 ==How to buy==

Admin at 02:30, 9 June 2012

2012-06-09T02:30:25Z

← Older revision		Revision as of 02:30, 9 June 2012
Line 62:		Line 62:
	Here is the guide illustrates how to connect an Arduino to the DS3234 Real-Time Clock Module. The following is a table describing which pins on the Arduino should be connected to the pins on the DS3234 module:		Here is the guide illustrates how to connect an Arduino to the DS3234 Real-Time Clock Module. The following is a table describing which pins on the Arduino should be connected to the pins on the DS3234 module:

	[[~~File:~~File:DS3234 2.jpg]]		[[File:DS3234 2.jpg]]

	[[File:DS3234 table.jpg]]		[[File:DS3234 table.jpg]]

	[[File:DS3234 com.jpg]]		After uploading the sketch, in the serial monitor of the Arduino IDE, we can read the real time.

			[[File:DS3234 com.jpg\|450px]]

	==Example code==		==Example code==
Line 83:		Line 85:
	//=====================================		//=====================================
	int RTC_init(){		int RTC_init(){
	pinMode(cs,OUTPUT); // chip select		pinMode(cs,OUTPUT); // chip select
	// start the SPI library:		// start the SPI library:
	SPI.begin();		SPI.begin();
Line 110:		Line 112:
	}		}
	TimeDate[i]= a+(b<<4);		TimeDate[i]= a+(b<<4);

	digitalWrite(cs, LOW);		digitalWrite(cs, LOW);
	SPI.transfer(i+0x80);		SPI.transfer(i+0x80);

Admin: /* Example code */

2012-06-09T02:27:18Z

Example code

← Older revision		Revision as of 02:27, 9 June 2012
Line 83:		Line 83:
	//=====================================		//=====================================
	int RTC_init(){		int RTC_init(){
	pinMode(cs,OUTPUT); // chip select		pinMode(cs,OUTPUT); // chip select
	// start the SPI library:		// start the SPI library:
	SPI.begin();		SPI.begin();
Line 167:		Line 167:
	return(temp);		return(temp);
	}		}

	==Document==		==Document==

	==How to buy==		==How to buy==

Admin: Created page with "==Introduction== 300px This is a breakout board for MAXIM DS3234 real-time clock.The DS3234 is a low-cost, extremely accurate SPI™ bus real-time clock..."

2012-06-09T02:24:48Z

Created page with "==Introduction== 300px This is a breakout board for MAXIM DS3234 real-time clock.The DS3234 is a low-cost, extremely accurate SPI™ bus real-time clock..."

New page

==Introduction==
[[File:DS3234 1.jpg|300px]]

This is a breakout board for MAXIM DS3234 real-time clock.The DS3234 is a low-cost, extremely accurate SPI™ bus
real-time clock (RTC) with an integrated temperature-com-
pensated crystal oscillator (TCXO) and crystal. The
DS3234 incorporates a precision, temperature-compen-
sated voltage reference and comparator circuit to monitor
VCC. When VCC drops below the power-fail voltage (VPF),
the device asserts the RST output and also disables read
and write access to the part when VCC drops below both
VPF and VBAT. The RST pin is monitored as a pushbutton
input for generating a µP reset. The device switches to the
backup supply input and maintains accurate timekeeping
when main power to the device is interrupted. The integra-
tion of the crystal resonator enhances the long-term accu-
racy of the device as well as reduces the piece-part count
in a manufacturing line. The DS3234 is available in com-
mercial and industrial temperature ranges, and is offered
in an industry-standard 300-mil, 20-pin SO package.

The DS3234 also integrates 256 bytes of battery-backed
SRAM. In the event of main power loss, the contents of
the memory are maintained by the power source con-
nected to the VBAT pin. The RTC maintains seconds,
minutes, hours, day, date, month, and year information.
The date at the end of the month is automatically adjust-
ed for months with fewer than 31 days, including correc-
tions for leap year. The clock operates in either the
24-hour or 12-hour format with AM/PM indicator. Two
programmable time-of-day alarms and a programmable
square-wave output are provided. Address and data are
transferred serially by an SPI bidirectional bus.

==Features==
* Accuracy ±2ppm from 0°C to +40°C
* Accuracy ±3.5ppm from -40°C to +85°C
* Battery Backup Input for Continuous Timekeeping
* Operating Temperature Ranges
**Commercial: 0°C to +70°C
**Industrial: -40°C to +85°C
* Low-Power Consumption
* Real-Time Clock Counts Seconds, Minutes,
**Hours, Day, Date, Month, and Year with Leap Year
**Compensation Valid Up to 2099
* Two Time-of-Day Alarms
* Programmable Square-Wave Output
* 4MHz SPI Bus Supports Modes 1 and 3
* Digital Temp Sensor Output: ±3°C Accuracy
* Register for Aging Trim
* RST Input/Output
* 300-Mil, 20-Pin SO Package
* Underwriters Laboratories Recognized

==Pin definition==
[[File:DS d1.jpg]]
[[File:DS d2.jpg|650px]]

==Usage==
Here is the guide illustrates how to connect an Arduino to the DS3234 Real-Time Clock Module. The following is a table describing which pins on the Arduino should be connected to the pins on the DS3234 module:

[[File:File:DS3234 2.jpg]]

[[File:DS3234 table.jpg]]

[[File:DS3234 com.jpg]]

==Example code==
#include <SPI.h>
const int cs=8; //chip select
void setup() {
Serial.begin(9600);
RTC_init();
//day(1-31), month(1-12), year(0-99), hour(0-23), minute(0-59), second(0-59)
SetTimeDate(11,12,13,14,15,16);
}
void loop() {
Serial.println(ReadTimeDate());
delay(1000);
}
//=====================================
int RTC_init(){
pinMode(cs,OUTPUT); // chip select
// start the SPI library:
SPI.begin();
SPI.setBitOrder(MSBFIRST);
SPI.setDataMode(SPI_MODE3); // both mode 1 & 3 should work
//set control register
digitalWrite(cs, LOW);
SPI.transfer(0x8E);
SPI.transfer(0x60); //60= disable Osciallator and Battery SQ wave @1hz, temp compensation, Alarms disabled
digitalWrite(cs, HIGH);
delay(10);
}
//=====================================
int SetTimeDate(int d, int mo, int y, int h, int mi, int s){
int TimeDate [7]={s,mi,h,0,d,mo,y};
for(int i=0; i<=6;i++){
if(i==3)
i++;
int b= TimeDate[i]/10;
int a= TimeDate[i]-b*10;
if(i==2){
if (b==2)
b=B00000010;
else if (b==1)
b=B00000001;
}
TimeDate[i]= a+(b<<4);

digitalWrite(cs, LOW);
SPI.transfer(i+0x80);
SPI.transfer(TimeDate[i]);
digitalWrite(cs, HIGH);
}
}
//=====================================
String ReadTimeDate(){
String temp;
int TimeDate [7]; //second,minute,hour,null,day,month,year
for(int i=0; i<=6;i++){
if(i==3)
i++;
digitalWrite(cs, LOW);
SPI.transfer(i+0x00);
unsigned int n = SPI.transfer(0x00);
digitalWrite(cs, HIGH);
int a=n & B00001111;
if(i==2){
int b=(n & B00110000)>>4; //24 hour mode
if(b==B00000010)
b=20;
else if(b==B00000001)
b=10;
TimeDate[i]=a+b;
}
else if(i==4){
int b=(n & B00110000)>>4;
TimeDate[i]=a+b*10;
}
else if(i==5){
int b=(n & B00010000)>>4;
TimeDate[i]=a+b*10;
}
else if(i==6){
int b=(n & B11110000)>>4;
TimeDate[i]=a+b*10;
}
else{
int b=(n & B01110000)>>4;
TimeDate[i]=a+b*10;
}
}
temp.concat(TimeDate[4]);
temp.concat("/") ;
temp.concat(TimeDate[5]);
temp.concat("/") ;
temp.concat(TimeDate[6]);
temp.concat(" ") ;
temp.concat(TimeDate[2]);
temp.concat(":") ;
temp.concat(TimeDate[1]);
temp.concat(":") ;
temp.concat(TimeDate[0]);
return(temp);
}
==Document==

==How to buy==