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YSS943 Scheda tecnica(PDF) 8 Page - YAMAHA CORPORATION |
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YSS943 Scheda tecnica(HTML) 8 Page - YAMAHA CORPORATION |
8 / 34 page YSS944/943/940 8 Type Pin No. Pin Name I/O Note 1) Function 135 nMUTE O This is the output pin during auto mute periods. 133 ZEROFLG O This is the consecutive zero data input detection pin. 13 STATUS7 12 STATUS6 11 STATUS5 10 STATUS4 116 STATUS3 115 STATUS2 114 STATUS1 113 STATUS0 O These are status output pins 7 to 0. They are used to confirm firmware operations. Normally, they should be left unconnected. 57 IOPORT7 General-purpose I/O ports 56 IOPORT6 I(+)/O These are general I/O port pins 7 to 0. Their I/O status can be set via register settings. 55 IOPORT5 54 IOPORT4 53 IOPORT3 52 IOPORT2 47 IOPORT1 General-purpose I/O ports 46 IOPORT0 I(+)/O These are general I/O port pins 7 to 0. Their I/O status can be set via register settings. 16 17 24 25 Test 132 TEST Is Test pins Connect these pins to a ground. Note 1) I/O symbols • I: Input • Is: Schmitt trigger input • O: Output • Ot: Tri-state output • I/O: I/O • I(+)/O: Pull-up during input, no pull-up during output Note 2) Example of circuit connected to crystal oscillator 12.288 MHz XI XO * The above resistor and capacitor vary depending on the crystal oscillator. Be sure to comply with the specifications of the crystal oscillator used. |
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