MCP7940NT MICROCHIP [Microchip Technology], MCP7940NT Datasheet
MCP7940NT
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MCP7940NT Summary of contents
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Low-Cost I with SRAM and Battery Switchover Device Selection Table Part Number (Bytes) MCP7940N Features: • Real-Time Clock/Calendar (RTCC), Battery Backed: - Hours, Minutes, Seconds, Day of Week, Day, Month and Year - Dual alarm with single output • On-Chip ...
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MCP7940N FIGURE 1-1: TYPICAL OPERATING CIRCUIT X1 RTCC Time-Stamp/ SRAM Alarms Switch BAT BAT V SS DS25010A-page MFP 2 I C™ SCL SDA 2011 Microchip Technology Inc. ...
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ELECTRICAL CHARACTERISTICS (†) Absolute Maximum Ratings V .............................................................................................................................................................................6.5V CC All inputs and outputs w.r.t. V ..........................................................................................................-0. Storage temperature ...............................................................................................................................-65°C to +150°C Ambient temperature with power applied................................................................................................-40°C to +125°C ESD protection on all pins ...
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MCP7940N TABLE 1-2: AC CHARACTERISTICS AC CHARACTERISTICS Param. Symbol Characteristic No Clock frequency CLK 2 T Clock high time HIGH 3 T Clock low time LOW 4 T SDA and SCL rise time R (Note ...
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FIGURE 1-2: BUS TIMING DATA 5 SCL 7 3 SDA SDA Out 2011 Microchip Technology Inc MCP7940N DS25010A-page 5 ...
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MCP7940N 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in FIGURE 2-1: DEVICE PINOUTS SOIC/DFN/MSOP/TSSOP Vcc MFP SCL BAT Vss 4 5 SDA 2.1 Serial Data (SDA) This is ...
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I C BUS CHARACTERISTICS 2 3 Interface The MCP7940N supports a bidirectional 2-wire bus and data transmission protocol. A device that sends data onto the bus is defined as transmitter, and a device receiving data as ...
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MCP7940N FIGURE 3-2: ACKNOWLEDGE TIMING SCL SDA Data from transmitter Transmitter must release the SDA line at this point allowing the Receiver to pull the SDA line low to acknowledge the previous eight bits of data. ...
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RTCC FUNCTIONALITY The MCP7940N family is a highly integrated RTCC. On-board time and date counters are driven from a low- power oscillator to maintain the time and date. An integrated V switch enables the device to maintain CC the ...
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MCP7940N TABLE 4-1: RTCC MEMORY MAP Address Bit 7 Bit 6 Bit 5 1Ch 10 Minutes 1Dh 10 Hour 12/24 AM/PM 1Eh 10 Date 1Fh Day 4.1.1 RTCC REGISTER ADDRESSES 0x00h – Contains the BCD seconds and 10 seconds. The ...
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ALMxIF: This is the Alarm Interrupt Fag. This bit is set in hardware if the alarm was triggered. The bit is cleared in software. • ALMxC2:0: These Configuration bits determine the alarm match. The logic will trigger the alarm ...
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MCP7940N With bits RS1 and RS0 set to ‘00’, the calibration function can be expressed as (32768 +/- (2 * CALREG)) T output where clock period of MFP output signal output T = clock period of ...
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MFP Pin multi-function pin and supports the following functions: • Use of the OUT bit in the Control register for single bit I/O • Alarm Outputs – Available in V mode BAT • FOUT mode – ...
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MCP7940N 5.0 ON BOARD MEMORY The MCP7940N has battery-backed SRAM. The SRAM is arranged bytes and is retained when the V supply is removed, provided the present and enabled. 5.1 SRAM FIGURE 5-1: ...
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RTCC/SRAM 5.2.1 SRAM BYTE WRITE Following the Start condition from the master, the control code and the R/W bit (which is a logic low) are clocked onto the bus by the master transmitter. This indicates to the addressed slave ...
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MCP7940N 5.2.2.3 Sequential Read Sequential reads are initiated in the same way as a random read except that after the MCP7940N transmits the first data byte, the master issues an Acknowledge as opposed to the Stop condition used in a ...
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PACKAGING INFORMATION 6.1 Package Marking Information 8-Lead SOIC (3.90 mm) XXXXXT XXYYWW NNN 8-Lead TSSOP XXXX TYWW NNN 8-Lead MSOP XXXXX YWWNNN 8-Lead 2x3 TDFN XXX YWW NN Part Number MCP7940N Note Temperature grade NN = Alphanumeric ...
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MCP7940N DS25010A-page 18 2011 Microchip Technology Inc. ...
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Microchip Technology Inc. MCP7940N DS25010A-page 19 ...
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MCP7940N DS25010A-page 20 2011 Microchip Technology Inc. ...
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D N NOTE 2011 Microchip Technology Inc MCP7940N φ L DS25010A-page 21 ...
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MCP7940N Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS25010A-page 22 2011 Microchip Technology Inc. ...
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D N NOTE 2011 Microchip Technology Inc MCP7940N φ L DS25010A-page 23 ...
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MCP7940N DS25010A-page 24 2011 Microchip Technology Inc. ...
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Microchip Technology Inc. MCP7940N DS25010A-page 25 ...
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MCP7940N DS25010A-page 26 2011 Microchip Technology Inc. ...
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D N NOTE 2011 Microchip Technology Inc MCP7940N φ L DS25010A-page 27 ...
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MCP7940N Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS25010A-page 28 2011 Microchip Technology Inc. ...
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APPENDIX A: REVISION HISTORY Revision A (04/2011) Original release of this document. 2011 Microchip Technology Inc. MCP7940N DS25010A-page 29 ...
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MCP7940N NOTES: DS25010A-page 30 2011 Microchip Technology Inc. ...
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THE MICROCHIP WEB SITE Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web ...
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MCP7940N READER RESPONSE It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our ...
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... MCP7940N-I/SN: Industrial Tempera- ture, SOIC package. b) MCP7940NT-I/SN: Industrial Tempera- 2 ture, SOIC package, Tape and Reel. C™ Serial RTCC 2 C Serial RTCC c) MCP7940NT-I/MNY: Industrial Tempera- ture, TDFN package Serial RTCC d) MCP7940N-I/SN: Industrial Tempera Serial RTCC, ture, SOIC package. e) MCP7940N-I/MS: Industrial Tempera- ...
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MCP7940N NOTES: DS25010A-page 34 2011 Microchip Technology Inc. ...
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Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families ...
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