PIN
NO.
I/O
FUNCTION
NAME
PIN
NO.
I/O
FUNCTION
NAME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
D23
D22
D21
D20
D19
D18
D17
D16
D15
Vss
D14
D13
D12
D11
D10
D09
D08
D07
D06
D05
D04
D03
D02
D01
D00
V
DD
Vss
OENP
BA0
MODA
MODB
OENO
SO3
SO2
SO1
SO0
AO1
AO0
WIN
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I
I
I
O
O
O
O
I
I
I
Parallel I/O ports (D
00
: LSB, D
23
: MSB)
Ground
Parallel I/O ports (D
00
: LSB, D
23
: MSB)
Power supply
Ground
Output control terminal for parallel ports
D
00
-D
15
.
When Lo: internal bus external
When BA0 is Hi, the impedance of the
parallel ports will be Hi even if this is set
to Lo.
Terminal for selecting origin of data writing
for the serial output section.
When Lo: serial input section serial output
section.
When Hi: parallel port serial output section
However, control cannot be carried out
except when MODA=MODB=Lo.
4 Internal Blocks
1: Serial Input section (SI)
2: Serial Output section (SO)
3: Buffering section (BUF)
4: Parallel port section (PARA)
Terminals used to determine how
connections are made.
The input and output channels are the
same except when MODA=MODB=Lo.
Output control terminal. Works in conjunction
with the serial output terminals SO0-3.
Output is 0 when Hi, and operation is normal
when Lo.
Serial data output terminals.
Writing channel selection ter-
minals for internal parallel bus
serial output latch.
Control cannot be carried out
unless MODA=MODB=Lo.
Write signal to internal parallel bus serial
output latch. Parallel bus data can be receiv-
ed in the shift out latch when Hi Lo Hi.
However, control cannot be carried out un-
less MODA=MODB=Lo.
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
EXCO
CO1
Vss
CO0
BCKO
SCKO
SYNO
MCKO
TST
RESN
MCKI
SYNI
SCKI
BCKI
CI1
CI0
EXCI
Vss
V
DD
AI1
AI0
SI3
SI2
SI1
SI0
I
I
I
O
I
I
I
I
I
I
I
I
O
I
I
I
I
I
I
I
I
I
I
I
MSB/LSB reverse control terminal for
internal parallel busŮserial output. Basic
format is maintained when Lo. When
this goes Hi, the MSB/LSB are reversed.
Serial output selection terminal
Ground
Serial output selection terminal
Parallel to serial conversion clock output
terminal for serial output section.
Normally connected to SCKO.
Parallel to serial conversion clock input
terminal for serial output section. Data from
SO0-3 is output at the rising edge of the
clock.
*The start of a word must always be a rising
edge.
Sync word input terminal for serial output
section. The start of a word is defined as
the third rising edge of the MCKO after
going from Hi to Lo.
Master clock input terminal for serial output
section. Receives 128 x fs (rising edge
first ) clock.
Pin for LSI testing. Normally fixed at Lo
System reset terminal
Master clock input terminal for serial input
section. Receives 128 x fs (rising edge
first ) clock.
Sync word input terminal for serial input
section. The start of a word is defined as
the third rising edge of the MCKI after going
from Hi to Lo.
Serial to parallel conversion clock input ter-
minal for serial input section. Data from
SI0-3 is received at the falling edge of the
clock. Normally connected to BCKI.
Serial to parallel conversion clock output
terminal for serial input section. Normally
connected to SCKI.
Serial input format selection terminals
*Caution is advised when changing modes
dynamically. (CI0 and CI1 are latched at
the start of a word.)
MSB/LSB reserve control terminal for serial
input internal parallel bus. Basic format is
maintained when Lo. When this goes Hi,
the MSB/LSB are reversed.
Ground
Power supply
Register channel selection
terminals for serial input
internal parallel bus output.
However, control cannot be carried out
unless MODA=MODB=Lo. When MODA
=MODB=Lo, each word is output 1/4 at
a time from channels 0, 1, 2, and 3.
Serial data input terminals.
YM6067 (XH494A00) PSC4 (Parallel Serial Converter)
MAIN: IC159
0
0
1
1
MODB
0
1
0
1
MODA
SI SO
PARA
SI SO
PARA
SI BUF SO
PARA
SI BUF SO
PARA
Signal Path
Enabled
Disabled
Disabled
Disabled
AI0, 1:A00, 1: BAO: WTN
S00
S01
S02
S03
ch 0
ch 1
ch 2
ch 3
YAMAHA 24-1 YAMAHA 24-2
YAMAHA 48
YAMAHA 96
ch 0
ch 1
ch 2
ch 3
ch 0, 1
x
ch 2, 3
x
ch 0, 1, 2, 3
x
x
x
SI0
SI1
SI2
SI3
ch 0
ch 1
ch 2
ch 3
YAMAHA 24-1 YAMAHA 24-2
YAMAHA 48
YAMAHA 96
ch 0
ch 1
ch 2
ch 3
ch 0, 1
x
ch 2, 3
x
ch 0, 1, 2, 3
x
x
x
0
0
1
1
AO1
0
1
0
1
AO0
0
1
2
3
channel
0
0
1
1
AI1
0
1
0
1
AI0
0
1
2
3
channel
0
0
1
1
CO1
0
1
0
1
CO0
YAMAHA 24-1 (1 channel/1 line)
YAMAHA 24-2 (1 channel/1 line)
YAMAHA 48 (2 channel/1 line)
YAMAHA 96 (4 channel/1 line)
FORMAT
0
0
1
1
Cl1
0
1
0
1
Cl0
YAMAHA 24-1 (1 channel/1 line)
YAMAHA 24-2 (1 channel/1 line)
YAMAHA 48 (2 channel/1 line)
YAMAHA 96 (4 channel/1 line)
FORMAT
D24
23
