— 5 —
Out
Out
---
---
In
In
Out
---
Out
In
In
---
---
In
In
In
---
---
---
In
In
In
---
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 In/Out Function
1
2
3, 4, 12, 13, 15,
24 ~ 26, 28 ~
42, 44, 50, 53,
59 ~ 66, 69,
71, 72, 74, 75,
77 ~ 79, 81 ~
83,
5, 7, 14, 18, 19,
21, 48, 54, 58,
67, 84, 86
6, 16, 46, 57,
76, 85, 94
8
9
10
11
17, 20, 22, 23,
55
27, 52, 56, 80,
86
43
45
47
49
51
68, 70, 73, 92,
93, 95, 97, 100
87
88, 89
90
91
98
99
CLBD
CKOUT
NC
GND
VCC
DACSEL
DABD0
DABD1
WSBD
Test0 ~ Test4
VC3
IRQ
MIDI OUT
WR
CS
RD
D0 ~ D7
LFT
X1, X2
RESET
PDWN
MIDI IN
RUN
Digital Audio Bit clock
Buffered X2 output Terminal
Not used. (No connection)
Terminals connected to Digital Ground
Terminals connected to +3V source
DAC type selection Input terminal. DAC = 0: 12S, 16 to 20
bits; DAC = 1: Japanese 16 bits.
Digital audio main stereo output terminal.
Not used. Auxillary digital stereo output terminal.
Surround or 3DMIDI output.
Digital audio left/right select.
Test Pins that should be grounded.
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.
D0 ~ D7 data write control terminal.
Chip select, active low.
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.
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.
To exit from power-down, PDWN should be high and
RESET applied.
Serial TTL MIDI Input terminal.
Not used. Terminal indicates that the synthesizer is up and
running.
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