Yamaha D24 Service Manual page 23

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