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