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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UPD360 датащи(PDF) 199 Page - Microchip Technology |
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UPD360 датащи(HTML) 199 Page - Microchip Technology |
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199 / 221 page  2016-2017 Microchip Technology Inc. DS00002084C-page 199 UPD360 14.4.3 HPD INTERRUPT ENABLE REGISTER (HPD_INT_EN) 14.4.4 HPD EVENT QUEUE REGISTER (HPD_QUEUE) This register implements a circular queue that records HPD events detected by the device. As an event is detected, it is written into the next HPD Event status field that is available and initially starts at HPD Event 0 out of reset. After this register is read, any entries with a valid HPD event field are cleared when software writes 01b into the respec- tive locations. The device will keep track of the last valid entry and store the next received event into the next entry. For example, if entries 0 and 1 are valid, the device will always place the next event into location 2, regardless of whether or not entries 0 and 1 have been cleared by software. The device will only add entries to empty fields. After writing to HPD Event 3, the device will write the next event into HPD Event 0, if available. Each field is encoded as follows. • 00b: HPD event field is empty • 01b: HPD_HIGH Detected • 10b: HPD_LOW Detected • 11b: HPD_IRQ Detected When HPD Enable is set to 0b and/or HPD Configuration is set to 1b, this register will always read 00h. After four HPD events are recorded, any future HPD events shall be ignored until HPD event locations are freed up by software. Address: 0C02h Size: 8 bits BITS DESCRIPTION TYPE DEFAULT 7:4 RESERVED RO 0h 3:0 HPD Interrupt Enable When “0”, prevents generation of the respective interrupt. R/W 0h Address: 0C03h Size: 8 bits BITS DESCRIPTION TYPE DEFAULT 7:6 HPD Event 3 R/WC 00b 5:4 HPD Event 2 R/WC 00b 3:2 HPD Event 1 R/WC 00b 1:0 HPD Event 0 R/WC 00b |
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