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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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38K2 датащи(PDF) 38 Page - Renesas Technology Corp |
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38K2 датащи(HTML) 38 Page - Renesas Technology Corp |
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38 / 358 page  FUNCTIONAL DESCRIPTION Rev.2.00 Oct 15, 2006 page 19 of 130 38K2 Group REJ09B0338-0200 HARDWARE Key Input Interrupt (Key-on Wake Up) A Key-on wake up interrupt request is generated by applying a falling edge to any pin of port P0 that have been set to input mode. In other words, it is generated when AND of input level goes from “1” to “0”. An example of using a key input interrupt is shown in Figure 15, where an interrupt request is generated by pressing one of the keys consisted as an active-low key matrix which inputs to ports P00–P03. Fig. 15 Connection example when using key input interrupt and port P0 block diagram ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ ✽ Port P00 latch Port P00 direction register = “0” Port P01 latch Port P01 direction register = “0” Port P02 latch Port P02 direction register = “0” Port P03 latch Port P03 direction register = “0” Port P04 latch Port P04 direction register = “1” Port P05 latch Port P05 direction register = “1” Port P06 latch Port P06 direction register = “1” Port P07 latch Port P07 direction register = “1” P00 input P01 input P02 input P03 input P04 output P05 output P06 output P07 output PULL 0 register Bit 7 = “0” Port P0 Input reading circuit Port PXx “L” level output ✽ P-channel transistor for pull-up ✽✽ CMOS output buffer Key input interrupt request PULL 0 register Bit 6 = “0” PULL 0 register Bit 5 = “0” PULL 0 register Bit 4 = “0” PULL 0 register Bit 3 = “1” PULL 0 register Bit 2 = “1” PULL 0 register Bit 1 = “1” PULL 0 register Bit 0 = “1” |
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