Yamaha A5000 Service Manual page 13

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
SED1335F0B (XQ595A00) LCDC (LCD Controller)
PIN
NO.
NAME I/O
1 VA5 O
2 VA4 O
3 VA3 O
4 VA2 O
5 VA1 O
6 VA0 O
7 VR/W O
8 /VCE O
9 NC -
10 /RES I
11 NC -
12 NC -
13 /RD I
14 /WR I
15 SEL2 I
16 SEL1 I
17 OSC1 I
18 OSC2 O
19 /CS I
20 A0 I
21 VDD -
22 D0 I/O
23 D1 I/O
24 D2 I/O
25 D3 I/O
26 D4 I/O
27 D5 I/O
28 D6 I/O
29 D7 I/O
30 XD3 O
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
VRAM address bus
VRAM write strobe
VRAM chip enable
Reset
80: Read strobe, 68: E clock
80: Write strobe, 68: Read/Write
CPU 80/68 bus select
Clock
Chip select
Data bus signal discrimination
Power supply
Data bus
X driver data bus
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
NO.
NAME I/O
31 XD2 O
32 XD1 O
33 XD0 O
34 XECL O
35 XSCL O
36 VSS -
37 LP O
38 WF O
39 YDIS O
40 YD O
41 YSCL O
42 VD7 I/O
43 VD6 I/O
44 VD5 I/O
45 VD4 I/O
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
55 VA10 O
56 VA9 O
57 VA8 O
58 VA7 O
59 VA6 O
60 NC -
A5000/A4000
(IC8)
FUNCTION
Track 00 signal
Index signal
Read data input from FDD
Clock
Clock
Ground
Power supply
Write control
Write data to FDD
Ground
Step signal to control head of FDD
Direction
Head load
Head select
Ground
Drive select
Ground
Motor on
Ground
(IC9)
FUNCTION
X driver data bus
X driver enable chain clock
X driver shift clock
Ground
Latch pulse
Frame signal
LCD power down
Scan start pulse
Scan shift clock
VRAM data bus
VRAM address bus
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