V3022 EMMICRO [EM Microelectronic - MARIN SA], V3022 Datasheet
V3022
Available stocks
Related parts for V3022
V3022 Summary of contents
Page 1
... V3022, internal time update cycles are invisible to the user's software. Time data can be read from the V3022 hour data formats. An external signal puts the V3022 in standby mode. Even in standby, the V3022 pulls the IRQ pin active low on an internal alarm interrupt ...
Page 2
... STA A STA STA TA = +25°C addr. 10 hex = 00 hex 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 V3022 Symbol Min Typ T - 2.0 5.0 DD dv/dt 100 Min Typ Max 1 ...
Page 3
... 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 V3022 Fig. 3 Fig. 4 Fig. 5 ...
Page 4
... 50pF ACC LOAD ADW / /Dt in ns; where C (external parasitic capacitance EXT 4 V3022 Min. Typ. Max 100 100 200 200 5 10 www.emmicroelectronic.com Unit ...
Page 5
... R Intel Interface Write Timing Write Read Copyright © 2004, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com V3022 Fig. 6b Fig. 6c Fig. 6d ...
Page 6
... R Motorola Interface Motorola Write Write Read Copyright © 2004, EM Microelectronic-Marin SA 6 www.emmicroelectronic.com V3022 Fig. 6e Fig. 6f Fig. 6g ...
Page 7
... R General Block Diagram Copyright © 2004, EM Microelectronic-Marin SA 7 www.emmicroelectronic.com V3022 Fig. 7 ...
Page 8
... Copyright © 2004, EM Microelectronic-Marin SA Initialisation When power is first applied to the V3022 all registers have a random value. To initialise the V3022, software must first write the I initialisation bit (addr. 2 bit 4) and then a 0. This sets the Frequency Tuning bit and clears all other status bits. ...
Page 9
... A /D must not change state during any single read or write access. One line of the address bus (e.g. A0) can be used to implement the Operating Configuration", Fig.1). Until a new address is written, data accesses (/D high) will always be to the same RAM address. 9 V3022 Parameter Range Data Space status 0 status 1 status 2 ...
Page 10
... These parameters have the ranges indicated in Table 9. The V3022 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 ...
Page 11
... 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 V3022 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 ...
Page 12
... Note that a 1 ppm error will At the result second difference after 11.5 days minute difference after 694 days ! The trimming range of the V3022 is from 0 to 251 ppm. The 251 ppm correction is obtained by writing 255 (FFhex) into the digital trimming IRQ will remain register. ...
Page 13
... 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 V3022 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 ...
Page 14
... R Battery or Supercap Connection Typical Applications V3022 Interfaced with Intel CPU ( RD and WR pulse) V3022 Interfaced with Motorola CPU ( pin tied and Copyright © 2004, EM Microelectronic-Marin V3022 Fig. 11 Fig. 12 Fig. 13 www.emmicroelectronic.com ...
Page 15
... The alarm feature is used to turn the controller power on and off at the time programmed by software. The V3022 pulls IRQ active low on an alarm even in standby and thus can control the power on/off switch for the controller. Fig. 14 Delivery Form Package Marking (first line) Tape & ...