AN1759 datasheet(7/24 Pages) FREESCALE

Part #	AN1759

Description	Add a Non-Volatile Clock to the MC68HC705J1A

Download	24 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

Logo

7 / 24 page

Application Note

DS1307 Hardware Interface

AN1759

7

Figure 4. Start and Stop Transfer Timing

Data Transfer

Data is transmitted on the rising edge of SCL. Data can only be changed

while SCL is LOW. The receiving device samples the bus after SCL goes

HIGH. There is one clock pulse per bit of data transmitted. See Figure 5.

Figure 5. Data Transfer Timing

Acknowledge

Transfer

The acknowledge transfer is a type of handshaking convention used to

signify that a successful transfer of data has taken place. After the

transmitting device sends out the eighth bit of a byte of data, it releases

the bus. The master sends out a ninth clock signal and the receiver

acknowledges the transfer by pulling SDA LOW. Once the transmitter

reads the LOW condition of SDA, it proceeds by taking over the bus and

sending out the next byte of data.

If the DS1307 is transmitting data and the master wants to end further

transmissions, the master sends a NO ACK signal (HIGH) back to the

DS1307. This tells the DS1307 that no more transfers are needed and

the stop transfer condition will be initiated soon. See Figure 6 for these

different timing patterns.

SCL

SDA

START

STOP

SCL

SDA

DATA

CHANGE

DATA

STABLE

DATA

STABLE

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

Similar Part No. - AN1759

Manufacturer	Part #	Datasheet	Description
List of Unclassifed Man...	AN1750-521P	39Kb / 1P	AN0625-521P
STMicroelectronics	AN1751	579Kb / 7P	EMI Filters: Recommendations and measurements
	AN1752	118Kb / 14P	ST72324 QUICK REFERENCE NOTE
	AN1753	559Kb / 22P	Software UART using ST7LITE0 12-bit autoreload timer
	AN1754	135Kb / 19P	DATA LOGGING PROGRAM FOR TESTING ST7 APPLICATIONS VIA ICC

More results

Similar Description - AN1759

Manufacturer	Part #	Datasheet	Description
Freescale Semiconductor...	AN1241	1Mb / 21P	Interfacing the MC68HC705J1A to 9356/9366 EEPROMs
List of Unclassifed Man...	S-2210R	193Kb / 1P	NON-VOLATILE MEMORY/NON-VOLATILE RAM
Integrated Device Techn...	IDT1338	321Kb / 23P	REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM
Renesas Technology Corp	1338-18DCGI	748Kb / 24P	Real-Time Clock with Battery Backed Non-Volatile RAM September 30, 2020
Integrated Device Techn...	IDT1338	436Kb / 23P	REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM
Renesas Technology Corp	IDT1338B-31	649Kb / 24P	REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 112309
Seiko Instruments Inc	S-24	857Kb / 15P	SERIAL NON-VOLATILE RAM
Rohm	BU9831	149Kb / 13P	Non-volatile electronic potentiometer
Xilinx, Inc	XCCACE-TQ144	1Mb / 69P	Non-volatile system solution
Seiko Instruments Inc	S-22	656Kb / 12P	PARALLEL NON-VOLATILE RAM

More results

AN1759 Datasheet(PDF) 7 Page - Freescale Semiconductor, Inc

AN1759 Datasheet(HTML) 7 Page - Freescale Semiconductor, Inc

Similar Part No. - AN1759

Similar Description - AN1759

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

Datasheet Download

Link URL