V3023 EMMICRO [EM Microelectronic - MARIN SA], V3023 Datasheet
V3023
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V3023 Summary of contents
Page 1
... V3023, internal time update cycles are invisible to the user's software. Time data can be read from the V3023 hour data formats. An external signal puts the V3023 in standby mode. Even in standby, the V3023 pulls the IRQ pin active low on an internal alarm interrupt ...
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... STA A STA STA T = +25°C addr. 10 hex = 00 hex A 2.0 ≤ V ≤ 5.5 V (note 3) sta DD addr. 10 hex = 00 hex sta +25°C, first year and all other I/O pads fixed V3023 Symbol Min Typ T - 2.0 5.0 DD dv/dt 100 Min Typ Max 1 1.5 0.4 ...
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... T = the temperature of interest in ° the turnover temperature (25 ± 5° determine the clock error (accuracy given temperature, add the frequency tolerance at 25°C to the value obtained from the formula above. 3 www.emmicroelectronic.com V3023 Fig. 3 Fig. 4 Fig. 5 ...
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... 50pF ACC LOAD ADW / /Dt in ns; where C (external parasitic capacitance EXT 4 V3023 Min. Typ. Max 100 100 200 200 5 10 www.emmicroelectronic.com Unit ...
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... R Intel Interface Write Timing Write Read Copyright © 2004, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com V3023 Fig. 6b Fig. 6c Fig. 6d ...
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... R Motorola Interface Motorola Write Write Read Copyright © 2004, EM Microelectronic-Marin SA 6 www.emmicroelectronic.com V3023 Fig. 6e Fig. 6f Fig. 6g ...
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... R General Block Diagram Copyright © 2004, EM Microelectronic-Marin SA 7 www.emmicroelectronic.com V3023 Fig. 7 ...
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... Copyright © 2004, EM Microelectronic-Marin SA Initialisation When power is first applied to the V3023 all registers have a random value. To initialise the V3023, software must first write the I initialisation bit (addr. 2 bit 4) and then a 0. This sets the I Frequency Tuning bit and clears all other status bits. ...
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... AM/PM bit. A set AM/PM bit indicates PM. In the 24 hour time data format the bit will always be zero. Note 2 : The alarm hours, addr. 33 hex, must always be rewritten after a change between 12 and 24 hour modes. 9 V3023 Parameter Range Data Space status 0 status 1 status 2 ...
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... These parameters have the ranges indicated in Table 9. The V3023 may be programmed for hour time format (see section "12/24 Data Format"). If a parameter is found to be out of range, it will be cleared when the units value on its being next incremented is equal to or greater than 9 eg ...
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... Thus it is possible to achieve a repeat feature where an alarm occurs every programmed number of seconds, or seconds and minutes, or seconds, minutes and hours. The V3023 pulls the open drain IRQ line active low during standby when an alarm interrupt occurs. If the 12/24 hour mode is changed then the alarm hours must be re-initialised ...
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... Note that a 1 ppm error will result second difference after 11.5 days minute difference after 694 days ! The trimming range of the V3023 is from 0 to 251 ppm. The 251 ppm correction is obtained by writing 255 (FFhex) into the digital trimming register. ...
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... How to Determine the Digital Trimming Value The value to write into the digital trimming register has to be determined by the following procedure: 1. Initialise the V3023 by writing a 1 and then a 0 into the "Initialisation Bit" of the status register 2 (addr. 02 hex, bit 4). This activates the frequency tuning mode in status register 0 (addr ...
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... R Battery or Supercap Connection Typical Applications V3023 Interfaced with Intel CPU ( RD and WR pulse) V3023 Interfaced with Motorola CPU ( pin tied and Copyright © 2004, EM Microelectronic-Marin V3023 Fig. 11 Fig. 12 Fig. 13 www.emmicroelectronic.com ...
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... The alarm feature is used to turn the controller power on and off at the time programmed by software. The Temperature sensor V3023 pulls IRQ active low on an alarm even in standby and thus can control the power on/off switch for the controller. • The user RAM provides the controller with non-volatile RAM for vital parameters, for example: 1 ...