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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CDB5521 датащи(PDF) 20 Page - Cirrus Logic |
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CDB5521 датащи(HTML) 20 Page - Cirrus Logic |
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20 / 28 page  CDB5521/22/23/24/28 20 DS317DB2 • Test Mode 3, Continuously Acquire Single Conversion This test mode repetitively acquires a single conversion. To enter this mode, set the test switches to 011 and press reset. A binary three is indicated on the LED’s. By probing HDR6 and using CS as a triggering pin, an oscillo- scope or logic analyzer will display in real-time how the microcontroller reads conversion data. •Test Mode 4 Reserved for future modifications. • Test Mode 5, Continuously Read Gain Reg- ister This test mode repetitively acquires the gain registers default contents (0x800000 HEX). To enter this mode, set the test switches to 101 and press reset. The LED’s should indicate a binary five. By probing HDR6 and using CS as a trig- gering pin, an oscilloscope or logic analyzer will display in real-time how the microcontrol- ler acquires a conversion. • Test Mode 6, PC to Microcontroller RS-232 Communication Link Test This test mode tests the ability of the PC to communicate to the evaluation board. It con- sists of two subtests: 1) test the link between the PC and the RS-232 interface circuitry; and 2) test the RS-232 link between the PC and the microcontroller. HDR7 distinguishes these two subtests. Set HDR7 to Normal to test the complete commu- nication link. Or set HDR7 to Loop Back to test the link between the RS-232 Circuitry and the PC. Then, set the test switches to 110 and reset the evaluation board. The LED’s should indi- cate a binary six signifying that the hardware is ready to initiate the test. To complete the test, the user must initialize the PC. First, use the SETUP menu to select a communications port and then select the TESTRS232 option. From there, user prompts navigate the user through the test. The PC indicates if the test passes or fails. Once either test is complete, the LED’s toggle to indicate that the test mode is com- plete. • Test Mode 7, Toggle LED’s This test mode tests the evaluation board LED’s. To enter this mode, set the test switches to 111 and reset the board. If the mode passes, the LED’s toggle. Note: Remember, to return to the normal operating mode, set the test switches to binary zero, return HDR7 to Normal, and reset the evaluation board. |
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