Yamaha Portatone PSR-550 Service Manual page 16

PSR-550
HD63266F (XI939A00) FDC (Floppy Disk Controller)
PIN
NAME I/O
NO.
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
S6A0065B01-Q0RJ (XV993A00) 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
16
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
NAME I/O
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
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
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