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Sound Engine (Dream SAM9773)
The sound engine read MIDI message from the MCU and convert them into digital audio data to the external
DAC of sound drum output. The following table shows the pin function of the LSI.
Pin. No.
Terminal
1
CLBD
2
CKOUT
3, 4, 12, 13, 15,
24 ~ 26, 28 ~
42, 44, 50, 53,
59 ~ 66, 69,
NC
71, 72, 74, 75,
77 ~ 79, 81 ~
83,
5, 7, 14, 18, 19,
21, 48, 54, 58,
GND
67, 84, 86
6, 16, 46, 57,
VCC
76, 85, 94
8
DACSEL
9
DABD0
10
DABD1
11
WSBD
17, 20, 22, 23,
Test0 ~ Test4
55
27, 52, 56, 80,
VC3
86
43
IRQ
45
MIDI OUT
47
WR
49
CS
51
RD
68, 70, 73, 92,
D0 ~ D7
93, 95, 97, 100
87
LFT
88, 89
X1, X2
90
RESET
91
PDWN
98
MIDI IN
99
RUN
In/Out
Out
Digital Audio Bit clock
Out
Buffered X2 output Terminal
---
Not used. (No connection)
---
Terminals connected to Digital Ground
In
Terminals connected to +3V source
DAC type selection Input terminal. DAC = 0: 12S, 16 to 20
In
bits; DAC = 1: Japanese 16 bits.
Out
Digital audio main stereo output terminal.
Not used. Auxillary digital stereo output terminal.
---
Surround or 3DMIDI output.
Out
Digital audio left/right select.
In
Test Pins that should be grounded.
In
Terminals connected to nominal +2.7V source.
Not used. Terminal for indicated that a MIDI byte is avail-
---
able for read on D0 ~ D7.
---
Not used. Serial TTL MIDI Output terminal.
In
D0 ~ D7 data write control terminal.
In
Chip select, active low.
In
D0 ~ D7 data read control terminal.
Not used. 8-bit di-directional bus under control of CS, RD,
---
WR
---
PLL external RC network.
---
Terminal connected to 9.6Mhz crystal.
In
Reset Input terminal, active low.
Power-down, active low. When power-down is active, then
all output pins will be floated. The crystal will be stopped.
In
To exit from power-down, PDWN should be high and
RESET applied.
In
Serial TTL MIDI Input terminal.
Not used. Terminal indicates that the synthesizer is up and
---
running.
— 5 —
Function
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