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71M6534 Datasheet(PDF) 77 Page - Maxim Integrated Products |
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71M6534 Datasheet(HTML) 77 Page - Maxim Integrated Products |
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77 / 132 page  FDS_6533_6534_004 71M6533/G/H and 71M6534/H Data Sheet Rev 2 77 Figure 44: Connecting a Battery Meters equipped with batteries need to contain code that transitions the chip to SLEEP mode as soon as the battery is attached in production. Otherwise, remaining in BROWNOUT mode would add unnecessary drain to the battery. 4.11 Flash Programming Operational or test code can be programmed into the flash memory using either an in-circuit emulator or the Flash Programmer Module (TFP-2). The flash programming procedure uses the E_RST, E_RXTX, and E_TCLK pins. The FL_BANK[2:0] field must be set to the value corresponding to the bank that is being programmed. 4.12 MPU Firmware Library All application-specific MPU functions mentioned in Section 3 Application Information are featured in the Teridian demonstration source code. The code is available as part of the Demonstration Kit for the 71M6533/71M6534. The Demonstration Kits come with the 71M6533/71M6534 preprogrammed with demo firmware and mounted on a functional sample meter Demo Board. The Demo Boards allow for quick and efficient evaluation of the IC without having to write firmware or having to supply an in-circuit emulator (ICE). 4.13 Crystal Oscillator The oscillator drives a standard 32.768 kHz watch crystal. The oscillator has been designed specifically to handle these crystals and is compatible with their high impedance and limited power handling capability. The oscillator power dissipation is very low to maximize the lifetime of any battery backup device attached to VBAT. Board layouts with minimum capacitance from XIN to XOUT will require less battery current. Good layouts will have XIN and XOUT shielded from each other. For best rejection of electromagnetic interference, connect the crystal body and the ground terminals of the two crystal capacitors to GNDD through a ferrite bead. No external resistor should be connected across the crystal, since the oscillator is self-biasing. 71M6533/6534 V3P3A DIO Power Supply V3P3SYS VBAT Battery or Super-Cap + - |
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Similar Description - 71M6534 |
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