YMF721 Datasheet, PDF (4/41 Pages) LSI Computer Systems – FM + Wavetable Synthesizer LSI

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