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UNIT TEST 6. Refer to Figure 4-35. Which instruction could be used to read the byte in the ADC after a conversion has been completed? a. IN AL, 90H b. OUT AL, 13H C. MOV AX, BX d. IN AL, 13H - ADC_CV IOVC# - 1. 7. A DAC port is connected as shown in Figure 4-35. From what map is the DAC port addressed? a. memory b. 1/0 C. ROM d. RAM N/100 ADCZENS DRC The resolution of a DAC with a 10V output and 8 input bits equals a. 10 divided by 256. b. 10 divided by 8. c. 8 divided by 10. d. 256 divided by 10. GATE EQUIVALENT Port of U22 OF PLD anc - - - - - - - - E NABLE CONVERT PER DAC DBO zone aaaaa sagda DB AD673 * Telenor 33 8. What are the RS-232C ADE-ENH signal levels? a. Logic 1 is 5V and logic O is OV. b. Logic O is -5V to -15V and logic 1 is +5V to +15V. c. Logic 1 is -5V to -15V and logic 0 is +5V to +15V. d. Logic 0 is 5V and logic 1 is OV. 4 DES Figure 4-35 D36 DB7 DAC EN 10 Holwer9 ANSSA Part of 122 9. When an ADC is used in a bipolar mode the input signal can be a. 80H. b. only negative. c. only positive. d. positive or negative. Figure 4-35 Refer to Figure 4-35. The address range of the DAC_EN# signal is 20H to 2FH. What address is used to write to the DAC? a. 20H b. 21H c. 22H d. 23H 10. What character will be on the display if a 45H is written to the character generator? NOTE: The character generator chart is in Appendix A. mu To output data from the CPU to an I/O device, what instruction must be used? a. JMP b. OUT C. IN d. MOV 4-32 Which device is used to input analog information into a microprocessor system? a. ADC b. DAC C. serial port d. PPI The serial port can be used to communicate with other external a. parallel ports. b. RS-232C ports. C. ADC ports. d. DAC ports. 4-31