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YMF721 Datasheet(PDF) 4 Page - LSI Computer Systems |
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YMF721 Datasheet(HTML) 4 Page - LSI Computer Systems |
4 / 41 page YMF721 July 10, 1997 - 4 - Others : 39 pins Pin name pins I/O Type Size Function 5V/3V 1 I CMOS - Selection of power supply /RESETSEL 1 I+ TTL - RST signal polarity control pin (When this pin is at "L", RST is active at "L".) /PDOUT 1 O CMOS 2mA Power down control output XI 1 I CMOS 2mA Crystal oscillator connection or master clock input (33.8688 MHz) XO 1 O CMOS 2mA Crystal oscillator connection pin N.C. 34 - - - To be open at normal use. LSI test pins : 21 pins Pin name pins I/O Type Size Function /TESTA 1 I+ TTL - To be open at normal use. /TESTB 1 I+ TTL - To be open at normal use. /TEST 1 I+ TTL - To be open at normal use. /TEST2 1 I+ TTL - To be open at normal use. /TEST3 1 I+ TTL - To be open at normal use. T7-0 8 O CMOS 2mA To be open at normal use. TD7-0 8 I/O CMOS 2mA To be open at normal use. Power supply, ground : 11 pins Pin name pins I/O Type Size Function VDD 4 - - - Power supply (put on +5.0 V or +3.3V) VSS 7 - - - Ground Total : 100 pins Note : I+ : Input pin with built-in pull-up resistor, OD : Open drain output pin |
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