2-84
Service Guide
Table 2-11
YMF715 Descriptions
Pin name
Pins
I/O
Type
Size
Function
MP9-0
l0
I+/O
TTL
4mA
Refer to “multi-purpose pins” section
Others: 27 pins
GPO - GP3
4
IA
-
-
Game Port
GP4- GP7
4
I+
Schmitt
2mA
Game Port
RXD
1
I+
Schmitt
2rnA
MIDI Data Receive
TXD
1
O
TTL
4mA
MIDI Data Transfer
/VOLUP
1
I+
Schmitt
2mA
Hardware Volume (Up)
/VOLDW
l
I+
Schmitt
2mA
Hardware Volume (Down)
X331
1
I
CMOS
2mA
33.8688 MHz
X33O
1
O
CMOS
2mA
33.8688 MHz
X24I
1
I
CMOS
2mA
24.576 MHz
X24O
1
O
CMOS
2mA
24.576 MHz
AVDD
2
-
-
-
Analog Power Supply (put on +5.0V)
DVDD
3
-
-
-
Digital Power Supply (put on +5.0 V or
+3.3V)
AVSS
2
-
-
-
Analog GND
DVSS
4
-
-
-
Digital GND
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
Summary of Contents for 390 Series
Page 15: ...System Introduction 1 3 Figure 1 2 PCB No 96183 1A Mainboard Layout Bottom ...
Page 96: ...2 50 Service Guide 2 3 3 Pin Configuration Figure 2 4 FDC37C67 TQFP Pin Diagram ...
Page 97: ...Major Chips Description 2 51 Figure 2 5 FDC37C67 QFP Pin Diagram ...
Page 102: ...2 56 Service Guide 2 3 6 Block Diagram Figure 2 6 FDC37C67 Block Diagram ...
Page 126: ...2 80 Service Guide 2 5 4 1 Functional Block Diagram Figure 2 10 M38813 Block Diagram ...
Page 128: ...2 82 Service Guide 2 6 2 Pin Diagram Figure 2 11 YMF715 Block Diagram ...
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