 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MAXQ3212 Datasheet(PDF) 19 Page - Maxim Integrated Products |
|
||||||||||||||||||||||||||||||
MAXQ3212 Datasheet(HTML) 19 Page - Maxim Integrated Products |
|
|
19 / 25 page  Microcontroller with Analog Comparator and LED Driver ____________________________________________________________________ 19 Programmable Timer The microcontroller incorporates one 16-bit program- mable timer/counter. The type 2 timer (timer 2) can be used in counter/timer/capture/compare/PWM functions, allowing precise control of internal and external events. It also supports optional single-shot, external gating, and polarity control options. Timer 2 The timer 2 peripheral includes the following: • 16-bit auto-reload timer/counter • 16-bit capture • 16-bit counter • 8-bit capture and 8-bit timer • 8-bit counter and 8-bit timer Wake-Up Timer The microcontroller includes a simple 20-bit wake-up timer that can be used to measure long intervals. The user-selectable timer period can be used to generate a long-period interrupt or wake the device out of stop mode. The timer can be clocked from either the cur- rently active system clock or the 8kHz ring oscillator. In stop mode, only the 8kHz ring oscillator is available as the wake-up timer clock source. As an interrupt, the feature increases overall performance by reducing many shorter timer interruptions to a single interrupt to measure the same long period. When used in stop mode, it provides the energy savings of the lowest power mode with periodic wake-up ability. Watchdog Timer An internal watchdog timer greatly increases system reliability. The timer resets the device if software execu- tion is disturbed. The watchdog timer is a free-running counter designed to be periodically reset by the appli- cation software. If software is operating correctly, the counter is periodically reset and never reaches its max- imum count. However, if software operation is interrupt- ed, the timer does not reset, triggering a system reset and optionally a watchdog timer interrupt. This protects the system against electrical noise or electrostatic dis- charge (ESD) upsets that could cause uncontrolled processor operation. The internal watchdog timer is an upgrade to older designs with external watchdog devices, reducing system cost and simultaneously increasing reliability. The watchdog timer is controlled through bits in the WDCN register. Its timeout period can be set to one of four programmable intervals ranging from 212 to 221 system clocks in its default clock mode, allowing flexi- bility to support different types of applications. The interrupt occurs 512 system clocks before the reset, allowing the system to execute an interrupt and place the system in a known, safe state before the device performs a total system reset. At 3.58MHz, watchdog timeout periods can be programmed from 1.14ms to 149.94s, depending on the system clock mode. Analog Comparator The analog comparator is a 1-bit, analog-to-digital comparator. The comparator input can be connected to a wide range of peripherals, including chemical sen- sors and motion or proximity detectors, or any other appropriate analog input. The comparator measures the analog input against either an external voltage ref- erence or the internal +2.5V reference. When the level on the comparator input, CMPI, rises above the select- ed voltage reference, the CMO bit in the CMPC register is changed to the desired level. The device then responds by asserting an external signal and/or activat- ing an internal interrupt request. The polarity of the external signal asserted is programmable. When not in use, the pins associated with the comparator are usable as general-purpose I/O. In addition, the +2.5V reference is configurable to be output on the VREF pin. This provides an absolute volt- age reference for use with data converters or other pre- cision devices. |
Similar Part No. - MAXQ3212 |
|
Similar Description - MAXQ3212 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
