Yamaha PORTATONE PSR-540 Service Manual page 4

PSR540
HD63266F (XI939A00) FDC (Floppy Disk Controller)
PIN
NO.
NAME I/O
1 8"//5" I
2 XTALSET I
3 /RESET I
4 E//RD I
5 RW//WR I
6 /CS I
7 /DACK I
8 RS0 I
9 RS1 I
10 VSS1
11 VSS2
12 D0 I/O
13 D1 I/O
14 D2 I/O
15 D3 I/O
16 D4 I/O
17 D5 I/O
18 D6 I/O
19 D7 I/O
20 /DREQ O
21 /IRQ O
22 /DEND I
23 VSS3
24 1/2 EX1
25 VCC1
26 NUM1 I
27 NUM3 I
28 IFS I
29 SFORM I
30 /INP I
31 /READY I
32 /WPRT I
KS0065B (XV933A00) LCD DRIVER
PIN
NAME
I/O
NO.
1 SC29 O
2 SC28 O
3 SC27 O
4 SC26 O
5 SC25 O
6 SC24 O
7 SC23 O
8 SC22 O
9 SC21 O
10 SC20 O
11 SC19 O
12 SC18 O
13 SC17 O
14 SC16 O
15 SC15 O
16 SC14 O
17 SC13 O
18 SC12 O
19 SC9 O
20 SC10 O
21 SC11 O
22 SC8 O
23 SC7 O
24 VDD
25 SC6 O
26 SC5 O
27 SC4 O
28 SC3 O
29 SC2 O
30 SC1 O
10
FUNCTION
Data transmission speed
Clock select
Rest
Enable/Read
Read/write/Write
Chip select
DMA acknowledge
Register select
Ground
Data bus
DMA request
Interrupt request
Data end
Ground
Power supply
Host interface select
Format data
Index pulse
Ready from FDD
Write control signal
FUNCTION
Segment signal output
for LCD driving
Power supply
Segment signal output
for LCD driving
PIN
NO.
NAME I/O
33 /TRKO I
34 /INDEX I
35 /RDATA I
36 XTAL2
37 EXTAL2
38 NC
39 XTAL1
40 EXTAL1
41 VSS4
42 VSS5
43 NC
44 VCC2
45 VCC3
46 VCC4
47 /WGATE O
48 /WDATA O
49 VSS6
50 /STEP O
51 /HDIR O
52 /HLOAD O
53 /HSEL O
54 VSS7
55 /DS0 O
56 /DS1 O
57 /DS2 O
58 /DS3 O
59 VSS8
60 /MON0 O
61 /MON1 O
62 /MON2 O
63 /MON3 O
64 VSS9
PIN
NAME
I/O
NO.
31 Vcc
32 CL1 I
33 CL2 I
34 GND(Vss)
35 DL1 I/O
36 DR1 I/O
37 DL2 I/O
38 DR2 I/O
39 NC
40 M I
41 SHL1 I
42 SHL2 I
43 FCS I
44 V1 I
45 V2 I
46 V3 I
47 V4 I
48 V5 I
49 V6 I
50 SC40 O
51 SC39 O
52 SC38 O
53 SC37 O
54 SC36 O
55 SC35 O
56 SC30 O
57 SC31 O
58 SC32 O
59 SC33 O
60 SC34 O
(DM IC800)
FUNCTION
Track 00 signal
Index signal
Read data input from FDD
Clock
Clock
Ground
Power supply
Write control
Writ data to FDD
Ground
Step signal to control head of FDD
Direction
Head load
Head select
Ground
Drive select
Ground
Motor on
Ground
(PN IC200)
FUNCTION
LCD driver circuit (-5V)
Data shift
Latch clock
GND (0V)
Data input / output
A lte rna te d s ig na l fo r L C D d riv e r o u tp u t
Data interface
Data interface
Mods selection
Power supply
Segment signal output
for LCD driving