YMF781 Datasheet, PDF (4/14 Pages) YAMAHA CORPORATION – APL-1 Automobile sound PLayer-1

YMF781
No. Terminal Name (Port) I/O (Output Type)
Function
51 SPOUT1
AO
Speaker connection terminal 1
52 SPOUT2
AO
Speaker connection terminal 2
53 VSS
-
Ground
54 D15
Ish/O (2mA) External memory Data Bus 15
55 D7
Ish/O (2mA) External memory Data Bus 7
56 D14
57 D6
Ish/O (2mA)
Ish/O (2mA)
External memory Data Bus 14
External memory Data Bus 6
58 D13
Ish/O (2mA) External memory Data Bus 13
59 D5
Ish/O (2mA) External memory Data Bus 5
60 D12
Ish/O (2mA) External memory Data Bus 12
61 VDD
-
Power Supply (3.3V)
62 VSS
-
Ground
63 VDD
-
Power Supply (3.3V)
64 D4
Ish/O (2mA) External memory Data Bus 4
65 D11
Ish/O (2mA) External memory Data Bus 11
66 D3
67 D10
Ish/O (2mA)
Ish/O (2mA)
External memory Data Bus 3
External memory Data Bus 10
68 D2
Ish/O (2mA) External memory Data Bus 2
69 D9
Ish/O (2mA) External memory Data Bus 9
70 D1
Ish/O (2mA) External memory Data Bus 1
71 D8
Ish/O (2mA) External memory Data Bus 8
72 D0
Ish/O (2mA) External memory Data Bus 0
73 VSS
-
Ground
74 VDD
-
Power Supply (3.3V)
75 RDN
(P30)
O
(4mA) External memory Read Enable
76 CS0N (P31)
O
(4mA) External memory Chip Select 0
77 CS1N (P32)
O
(4mA) External memory Chip Select 1
78 CS2N (P33)
O
(4mA) External memory Chip Select 2
79 A1
O
(4mA) External memory Address Bus 1
80 A2
O
(4mA) External memory Address Bus 2
81 A3
O
(4mA) External memory Address Bus 3
82 A4
83 A5
84 A6
85 A7
O
(4mA) External memory Address Bus 4
O
(4mA) External memory Address Bus 5
O
(4mA) External memory Address Bus 6
O
(4mA) External memory Address Bus 7
86 A17
O
(4mA) External memory Address Bus 17
87 A18
O
(4mA) External memory Address Bus 18
88 A19
O
(4mA) External memory Address Bus 19
89 VDD
-
Power Supply (3.3V)
90 VSS
-
Ground
91 VDD
-
Power Supply (3.3V)
92 WRN
(P34)
93 A21/A0 (P35)
94 A20
95 A8
O
(4mA) External memory Write Enable
O
(4mA) External memory Address Bus 21/0
O
(4mA) External memory Address Bus 20
O
(4mA) External memory Address Bus 8
96 A9
O
(4mA) External memory Address Bus 9
97 A10
O
(4mA) External memory Address Bus 10
98 A11
O
(4mA) External memory Address Bus 11
99 A12
O
(4mA) External memory Address Bus 12
100 A13
O
(4mA) External memory Address Bus 13
Note1: Ｏ: CMOS output terminal, I: CMOS input terminal, Ish: Schmitt CMOS input terminal, A: Analog terminal
Note2: The current value of the ( ) in the I/O (output type) indicates the output drive capability of its terminal.
Note3: The power supply, VDDC can be switched to 3.3V or 5.0V.
Note4: For the terminals without the description of “VDDC is used” in the table, VDD (only 3.3V) is used to drive it.
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