MCP79411-I/MS Microchip Technology, MCP79411-I/MS Datasheet
MCP79411-I/MS
Specifications of MCP79411-I/MS
Related parts for MCP79411-I/MS
MCP79411-I/MS Summary of contents
Page 1
... TDFN, MSOP • Pb-Free and RoHS Compliant • Temperature Ranges: - Industrial (I): -40°C to +85°C. 2010 Microchip Technology Inc. MCP79410/MCP79411/MCP79412 Description: The MCP7941X series of low-power Real-Time Clocks Unique ID (RTC) uses digital timing compensation for an accurate clock/calendar, a programmable output control for ...
Page 2
... MCP7941X FIGURE 1-1: TYPICAL OPERATING CIRCUIT X1 RTCC Time-Stamp/ SRAM Alarms Switch I BAT BAT V SS EEPROM ID DS22266A-page MFP 2 C™ SCL SDA Preliminary 2010 Microchip Technology Inc. ...
Page 3
... Rise Time (Note CC D15 V V Voltage Range BAT BAT (Note 1) Note 1: This parameter is periodically sampled and not 100% tested. 2: Standby with oscillator running 2010 Microchip Technology Inc. Electrical Characteristics: Industrial (I +1.8V to 5.5V CC Min. Typ. Max. Units — — — 0.7 V — ...
Page 4
... V 5.5V CC 1.8V V < 2.5V CC 2.5V V 5.5V CC 1.8V V < 2.5V CC 2.5V V 5.5V CC 1.8V V < 2.5V CC 2.5V V 5.5V CC (Note 1 and Note 2) — = 5.5V Page mode CC (Note 3) 2010 Microchip Technology Inc. ...
Page 5
... FIGURE 1-2: BUS TIMING DATA 5 SCL 7 3 SDA SDA Out 2010 Microchip Technology Inc Preliminary MCP7941X DS22266A-page 5 ...
Page 6
... Pin Function Vss Ground SDA Bidirectional Serial Data SCL Serial Clock X1 Xtal Input, External Oscillator Input X2 Xtal Output V Battery Backup Input (3V Typ) BAT MFP Multi Function Pin Vcc +1.8V to +5.5V Power Supply DS22266A-page 6 Table 2-1. Preliminary 2010 Microchip Technology Inc. ...
Page 7
... SCL SDA Start Condition 2010 Microchip Technology Inc. 3.1.1.4 Data Valid (D) The state of the data line represents valid data when, after a Start condition, the data line is stable for the duration of the high period of the clock signal. The data on the line must be changed during the low period of the clock signal ...
Page 8
... Preliminary Data from transmitter Receiver must release the SDA line at this point so the Transmitter can continue sending data. (Figure 3-3). The upper address bits are Upon receiving an ‘1010111’ A • • • • • • 0 2010 Microchip Technology Inc. or ...
Page 9
... Figure 3-4 flow diagram. FIGURE 3-4: ACKNOWLEDGE POLLING FLOW Send EE Write Command Send Stop Condition to Initiate EE Write Cycle Send Start Send Control Byte with R Did Device Acknowledge (ACK = 0)? YES Next Operation 2010 Microchip Technology Inc. for the NO Preliminary MCP7941X DS22266A-page 9 ...
Page 10
... Month 01-12 01h Reserved 01h Seconds 00-59 00h Minutes 00-59 00h Hours 1-12 + AM/PM 00h 00-23 Day 1-7 01h Date 01-31 01h Month 01-12 01h Reserved 01h 00h 00h 00h 00h 00h 00h 00h 00h 2010 Microchip Technology Inc. ...
Page 11
... Contains the BCD year and 10 year. The Range is 00-99. 0x07h – Is the Control register. 2010 Microchip Technology Inc. • Bit 7 is the OUT bit. This sets the logic level on the MFP when not using this as a square wave out- put. • ...
Page 12
... This will allow the unique EEPROM locations to be written. After the byte or page write to these locations, the write sequence is initiated by the Stop condition. At this time, the ID locations are locked and no further writes are possible to this location unless a complete unlock sequence is repeated. Preliminary 2010 Microchip Technology Inc. ...
Page 13
... The frequencies listed in the table presume an input clock source of exactly 32.768 kHz. In terms of the equivalent number of input clock cycles, the table becomes: FIGURE 4-1: RS1 AND RS0 WITH AND WITHOUT CALIBRATION 2010 Microchip Technology Inc. RS2 RS1 With regards to the calibration function, the Calibration register setting has no impact upon the MFP output clock signal when bits RS1 and RS0 are set to ‘ ...
Page 14
... Preliminary mode BAT mode BAT mode, other modes are suspended. pin BAT DD supply. The BAT Read/Write Powered Access By < BAT BAT < V Yes V CC BAT CC > V Yes V CC BAT CC 2010 Microchip Technology Inc. ...
Page 15
... The second set of registers, located at 0x1Ch through 0x1Fh, are loaded at the time when V is restored and the RTCC switches to V The power-fail time-stamp registers are cleared when the V bit is cleared in software. BAT 2010 Microchip Technology Inc. voltage. To TRIP Preliminary ...
Page 16
... S T CONTROL ADDRESS A BYTE BYTE ADDRESS BYTE DATA BYTE Note: Entering an address past 5F for an SRAM operation will result in the MCP7941X not acknowledging the address. . BAT Preliminary supply is present and BAT supply for retention DATA DATA BYTE 2010 Microchip Technology Inc. ...
Page 17
... As with the byte write operation, once the Stop condition is received, an internal write cycle will begin (Figure 5-4). 2010 Microchip Technology Inc. Note: Page write operations are limited to writing bytes within a single physical page, regardless of the number of bytes actually ...
Page 18
... Preliminary S T DATA DATA BYTE CURRENT ADDRESS READ (EEPROM SHOWN CONTROL DATA A T BYTE BYTE (Figure 5-2). After a random read 2010 Microchip Technology Inc. ...
Page 19
... The unique ID can be factory programmed on some devices to provide a unique IEEE EUI-48 or EUI-64 value. In addition, customer-provided codes can also be programmed. 2010 Microchip Technology Inc. master, the master will NOT generate an Acknowledge but will generate a Stop condition. To provide sequential reads, the MCP7941X contains an internal Address Pointer which is incremented by one at the completion of each operation ...
Page 20
... XXXX TYWW NNN 8-Lead MSOP XXXXX YWWNNN 8-Lead 2x3 TDFN XXX YWW NN Part Number MCP79410 MCP79411 MCP79412 Note Temperature grade NN = Alphanumeric traceability code Legend: XX...X Customer-specific information Y Year code (last digit of calendar year) YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 is week ‘01’) ...
Page 21
... Microchip Technology Inc. α φ β Preliminary MCP7941X DS22266A-page 21 ...
Page 22
... MCP7941X DS22266A-page 22 Preliminary 2010 Microchip Technology Inc. ...
Page 23
... Microchip Technology Inc. I Preliminary MCP7941X φ DS22266A-page 23 ...
Page 24
... MCP7941X DS22266A-page 24 I Preliminary 2010 Microchip Technology Inc. φ ...
Page 25
... Microchip Technology Inc. Preliminary MCP7941X DS22266A-page 25 ...
Page 26
... MCP7941X DS22266A-page 26 Preliminary 2010 Microchip Technology Inc. ...
Page 27
... APPENDIX A: REVISION HISTORY Revision A (10/2010) Original release of this document. 2010 Microchip Technology Inc. Preliminary MCP7941X DS22266A-page 27 ...
Page 28
... MCP7941X NOTES: DS22266A-page 28 Preliminary 2010 Microchip Technology Inc. ...
Page 29
... To register, access the Microchip web site at www.microchip.com. Under “Support”, “Customer Change Notification” and follow the registration instructions. 2010 Microchip Technology Inc. CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • Distributor or Representative • Local Sales Office ...
Page 30
... What deletions from the document could be made without affecting the overall usefulness there any incorrect or misleading information (what and where)? 7. How would you improve this document? DS22266A-page 30 FAX: (______) _________ - _________ N Preliminary Total Pages Sent ________ Literature Number: DS22266A 2010 Microchip Technology Inc. ...
Page 31
... C Serial RTCC, EUI-48 perature, TDFN package, Custom ID Serial RTCC, EUI-48 d) MCP79411-I/SN: Industrial Temperature, SOIC package, EUI- Serial RTCC, EUI-64 e) MCP79411-I/MS: Industrial Temperature Serial RTCC, EUI-64 MSOP package, EUI-48 f) MCP79412-I/SN: ture, SOIC package, EUI-64 g) MCP79412-I/ST: Industrial Temperature, TSSOP package, EUI-64 h) MCP79412T-I/ST: Industrial Temperature, ...
Page 32
... MCP7941X NOTES: DS22266A-page 32 Preliminary 2010 Microchip Technology Inc. ...
Page 33
... PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
Page 34
... Taiwan - Kaohsiung Tel: 886-7-213-7830 Fax: 886-7-330-9305 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 Preliminary 2010 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...