MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your 8051 Microcontroller knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In DS12887, when the external source is turned-off, how does DS12887 get power to retain its data? |
| A. | Internal Lithium Battery |
| B. | Internal Lead Battery |
| C. | Additional external Alkaline Battery |
| D. | Additional external Lithium Battery |
| Answer» B. Internal Lead Battery | |
| 2. |
Is DS12887 has non-volatile RAM? |
| A. | Yes |
| B. | No |
| C. | Can t be determined |
| D. | None of the mentioned |
| Answer» B. No | |
| 3. |
In DS12887, what is the range of RAM addresses which are used to store the values of time, calendar and alarm data? |
| A. | 00-7FH |
| B. | 00-09H |
| C. | 0EH-7FH |
| D. | 0A-0DH |
| Answer» C. 0EH-7FH | |
| 4. |
In DS12887, what is correct about the UIP bit of the register A? |
| A. | it is a read only bit |
| B. | it is used to know about the result |
| C. | it is used to select the DS12887 datasheet |
| D. | all of the mentioned |
| Answer» B. it is used to know about the result | |
| 5. |
In DS12887, which out of the following is correct about the SQW pin? |
| A. | it is an output pin |
| B. | it can provide up to 15 different square waves |
| C. | the frequency of the square wave is set by the register A |
| D. | all of the mentioned are correct |
| Answer» E. | |
| 6. |
In DS12887, which bits of the Register A are used to turn on the oscillator? |
| A. | D4 |
| B. | D5 |
| C. | D6 |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
DS12887 has _____ amount of RAM for general purpose applications. |
| A. | 9 bytes |
| B. | 114 bytes |
| C. | 128 bytes |
| D. | 14 bytes |
| Answer» C. 128 bytes | |
| 8. |
DS12887 has _____ amount of RAM. |
| A. | 14 bytes |
| B. | 114 bytes |
| C. | 128 bytes |
| D. | 64 bytes |
| Answer» D. 64 bytes | |