Ymf715 Descriptions - Acer 390 Series Service Manual

Table 2-11

YMF715 Descriptions

Pin name
MP9-0
Others: 27 pins
GPO - GP3
GP4- GP7
RXD
TXD
/VOLUP
/VOLDW
X331
X33O
X24I
X24O
AVDD
DVDD
AVSS
DVSS
Note: I+: Input Pin with Pull up Resistor
Schmitt: TTL-Schmitt input pin
T: TTL-tri-state output pin
O+: Output Pin with Pull up Resistor
2-84
Pins I/O
l0 I+/O
4 IA
4 I+
1 I+
1 O
1 I+
l I+
1 I
1 O
1 I
1 O
2 -
3 -
2 -
4 -
Type Size
TTL 4mA
- -
Schmitt 2mA
Schmitt 2rnA
TTL 4mA
Schmitt 2mA
Schmitt 2mA
CMOS 2mA
CMOS 2mA
CMOS 2mA
CMOS 2mA
- -
- -
- -
- -
Function
Refer to "multi-purpose pins" section
Game Port
Game Port
MIDI Data Receive
MIDI Data Transfer
Hardware Volume (Up)
Hardware Volume (Down)
33.8688 MHz
33.8688 MHz
24.576 MHz
24.576 MHz
Analog Power Supply (put on +5.0V)
Digital Power Supply (put on +5.0 V or
+3.3V)
Analog GND
Digital GND
Service Guide