Ic Block Diagram - Yamaha PORTATONE PSR-740 Service Manual

HD63266F (XI939A00) FDC (Floppy Disk Controller)
PIN
NAME I/O FUNCTION
NO.
1 8"//5" I Data transmission speed
2 XTALSET I Clock select
3 /RESET I Rest
4 E//RD I Enable/Read
5 RW//WR I Read/write/Write
6 /CS I Chip select
7 /DACK I DMA acknowledge
8 RS0 I
Register select
9 RS1 I
10 VSS1
Ground
11 VSS2
12 D0 I/O
13 D1 I/O
14 D2
I/O
15 D3 I/O
Data bus
16 D4 I/O
17 D5 I/O
18 D6 I/O
19 D7 I/O
20 /DREQ O DMA request
21 /IRQ O Interrupt request
22 /DEND I Data end
23 VSS3 Ground
24 1/2 EX1
25 VCC1 Power supply
26 NUM1 I
27 NUM3 I
28 IFS I Host interface select
29 SFORM I Format data
30 /INP I Index pulse
31 /READY I Ready from FDD
32 /WPRT I Write control signal
SED1335F0B (XQ595A00) LCDC (LCD Controller)
PIN
NAME I/O FUNCTION
NO.
1 VA5 O
2 VA4 O
3 VA3 O
VRAM address bus
4 VA2 O
5 VA1 O
6 VA0 O
7 /VWR O VRAM read/write
8 /VCE O Memory control
9 /VRD - Not used
10 /RES I Initial clear
11 NC - Not used
12 NC - Not used
13 /RD I Read strobe
14 /WR I Write strobe
15 SEL2 I Bus select
16 SEL1 I Bus select
17 OSC1 I Clock
18 OSC2 O Clock
19 /CS I Chip select
20 A0 I Data mode select
21 Vdd - Power supply
22 D0 I/O
23 D1 I/O
24 D2 I/O
25 D3 I/O
Data bus
26 D4 I/O
27 D5 I/O
28 D6 I/O
29 D7 I/O
30 XD3 O Data bus output for 4 bit dot
PIN
NAME I/O FUNCTION
NO.
33 /TRKO I Track 00 signal
34 /INDEX I Index signal
35 /RDATA I Read data input from FDD
36 XTAL2
Clock
37 EXTAL2
38 NC
39 XTAL1
Clock
40 EXTAL1
41 VSS4
Ground
42 VSS5
43 NC
44 VCC2
45 VCC3 Power supply
46
VCC4
47 /WGATE O Write control
48 /WDATA O Writ data to FDD
49 VSS6 Ground
50 /STEP O Step signal to control head of FDD
51 /HDIR O Direction
52 /HLOAD O Head load
53 /HSEL O Head select
54 VSS7 Ground
55 /DS0 O
56 /DS1 O
Drive select
57 /DS2 O
58 /DS3 O
59 VSS8
Ground
60 /MON0 O
61 /MON1 O
Motor on
62 /MON2 O
63 /MON3 O
64 VSS9 Ground
PIN
NAME I/O FUNCTION
NO.
31 XD2 O
32 XD1 O Data bus output for 4 bit dot
33 XD0 O
34 XECL O S driver enable, chain clock
35 XSCL O Data bus shift clock
36 Vss - Ground
37 LP O X driver latch pulse
38 WF O Frame signal for X/Y driver
39 YDIS O Power down signal for displaying off mode
40 YD O Scan start signal
41 YSCL O Scan shift clock
42 VD7 I/O
43 VD6 I/O
44 VD5 I/O
45 VD4 I/O
VRAM data bus
46 VD3 I/O
47 VD2 I/O
48 VD1 I/O
49 VD0 I/O
50 VA15 O
51 VA14 O
52 VA13 O
53 VA12 O
54 VA11 O
VRAM address bus
55 VA10 O
56 VA9 O
57 VA8 O
58 VA7 O
59 VA6 O
60 NC - Not used

IC BLOCK DIAGRAM

SN74HCU04NSR (XC723A00) SN74HC08NSR (XD831A00)
SN74HCU04N (IG142250) HD74LVC08FP (XU720A00)
Hex Inverter Quad 2 Input AND
DM: IC10,16(PSR-740) IC420(PSR-640)
DM: IC15(PSR-740) IC370(PSR-640)
JACK: IC02
1A 1
1
1A 14 VDD
1B 2
2 13
1Y
6A
1Y 3
3
12
2A 6Y
2A 4
4 11
2Y 5A
2B 5
5 10
3A 5Y
2Y 6
6 9
3Y
4A
VSS 7
7 8
Vss 4Y
TC74HC138AF (XM970A00)
SN74HC374ANSR (XQ042A00)
TC74HC138AFEL (XW762A00)
Octal 3-State D-Type Flip-Flop
3 to 8 Demultiplexer
DM: IC18,20(PSR-740) IC430,500(PSR-640)
DM: IC13,19(PSR-740) IC350,510(PSR-640)
OUTPUT
1 1
A 16 Vcc
CONTROL
A
Select 2 B 15 1Q 2
B Y0 YO Q
3 D CK
C Y1 14 1D 3
C Y1
4 G2A Y2 13
G2A Y2 2D 4 D CK
Output
Enable
Q
5 G2B Y3 12 2Q 5
G2B Y3
6 G1 Y4 11
G1 Y4 3Q 6 Q
Output 7 Y7 Y5 10 D CK
Y7 Y5 3D 7
Y6
8
GND 9 Y6 4D 8
D CK
Q
4Q 9
GND 10
M5227P (XF751A00) M5223AFP (XV117A00)
5-Band Graphic Equalizer
M5223AL (XW373A00)
AM: IC210,220 Dual Operational Amplifier
DM: IC33(PSR-740)
MIC: IC100(PSR-740)
47k
1 16
IN1 -Vcc Output A 1
10k
Inverting
2
2 15
NF1 GND Input A -
540
10k Non-Inverting
3
47k
Input A
3
14
IN2 +Vcc
Ground 4 -V
4 13
NF2 OUT
540
+ -
540 47k
5 12
IN3 -IN
6
11
NF3 +IN
540 47k
47k 540
7 10
IN4 NF5
+ -
8 9
NF4 IN5
540 47k
PSR-740/PSR-640
TC74HC32AF (XN241A00)
Quad 2 Input OR
DM: IC14(PSR-740) IC360(PSR-640)
14 VDD
1A 1 14 Vcc
13 4B
1B 2 13 4B
12 4A
1Y 3 12 4A
11 4Y
2A 4 11 4Y
10 3B
2B 5 10 3B
9 3A
2Y 6 9 3A
8 3Y
GND 7 8 3Y
SN75C1168N (XU463A00)
Line Driver / Receiver
JACK: IC01
20 Vcc 1
1B 16 Vcc
19 8Q 2 15
Q 1A 1D
OE OE
CK D 3
18 8D 14
1R 1Y
4 13
CK D 17 7D 1DE 1Z
OE OE
Q
16 7Q 5 12
2R 2DE
6 11
Q 15 6Q 2A 2Z
OE OE
CK D 7 10
14 6D 2B 2Y
8
13 5D GND 9 2D
CK D
OE OE
Q
12 5Q
11 CLOCK
LB1443N (XF483A00)
LED Driver
MIC: IC001(PSR-740)
+DC Voltage
+V 8
1 2 3 4 5 6 7 8 9
Supply
D1 D2 D3 D4 GND D5 OUT IN VCC
7 Output B
+
Inverting
6
+ - Input B
Non-Inverting
5
Input B
µPC4570HA (XB247A00)
Dual Operational Amplifier
AM: IC320,510
A B
- -
1 2 3 4 5 6 7 8 9
+V -IN -V -IN +V
OUT +IN +IN OUT
A A A B B B
19