Yamaha A4000, Руководство по обслуживанию

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A5000/A4000
13
(IC9)
(IC8)
SED1335F0B (XQ595A00) LCDC (LCD Controller)
PIN
NO.
NAME I/O FUNCTION
PIN
NO.
NAME I/O FUNCTION
1 VA5 O 31 XD2 O
2 VA4 O 32 XD1 O X driver data bus
3 VA3 O VRAM address bus 33 XD0 O
4 VA2 O 34 XECL O X driver enable chain clock
5 VA1 O 35 XSCL O X driver shift clock
6 VA0 O 36 VSS - Ground
7 VR/W O VRAM write strobe 37 LP O Latch pulse
8 /VCE O VRAM chip enable 38 WF O Frame signal
9 NC - 39 YDIS O LCD power down
10 /RES I Reset 40 YD O Scan start pulse
11 NC - 41 YSCL O Scan shift clock
12 NC - 42 VD7 I/O
13 /RD I 80: Read strobe, 68: E clock 43 VD6 I/O
14 /WR I 80: Write strobe, 68: Read/Write 44 VD5 I/O
15 SEL2 I CPU 80/68 bus select 45 VD4 I/O VRAM data bus
16 SEL1 I 46 VD3 I/O
17 OSC1 I Clock 47 VD2 I/O
18 OSC2 O 48 VD1 I/O
19 /CS I Chip select 49 VD0 I/O
20 A0 I Data bus signal discrimination 50 VA15 O
21 VDD - Power supply 51 VA14 O
22 D0 I/O 52 VA13 O
23 D1 I/O 53 VA12 O
24 D2 I/O 54 VA11 O VRAM address bus
25 D3 I/O 55 VA10 O
26 D4 I/O Data bus 56 VA9 O
27 D5 I/O 57 VA8 O
28 D6 I/O 58 VA7 O
29 D7 I/O 59 VA6 O
30 XD3 O X driver data bus 60 NC -
HD63266F (XI939A00) FDC (Floppy Disk Controller)
PIN
NO.
NAME I/O FUNCTION
PIN
NO.
NAME I/O FUNCTION
1 8"//5" I Data transmission speed 33 /TRKO I Track 00 signal
2 XTALSET I Clock select 34 /INDEX I Index signal
3 /RESET I Rest 35 /RDATA I Read data input from FDD
4 E//RD I Enable/Read 36 XTAL2 Clock
5 RW//WR I Read/write/Write 37 EXTAL2
6 /CS I Chip select 38 NC -
7 /DACK I DMA acknowledge 39 XTAL1 Clock
8 RS0 I Register select 40 EXTAL1
9 RS1 I 41 VSS4 - Ground
10 VSS1 - Ground 42 VSS5 -
11 VSS2 - 43 NC -
12 D0 I/O 44 VCC2 -
13 D1 I/O 45 VCC3 - Power supply
14 D2 I/O 46 VCC4 -
15 D3 I/O Data bus 47 /WGATE O Write control
16 D4 I/O 48 /WDATA O Write data to FDD
17 D5 I/O 49 VSS6 - Ground
18 D6 I/O 50 /STEP O Step signal to control head of FDD
19 D7 I/O 51 /HDIR O Direction
20 /DREQ O DMA request 52 /HLOAD O Head load
21 /IRQ O Interrupt request 53 /HSEL O Head select
22 /DEND I Data end 54 VSS7 - Ground
23 VSS3 - Ground 55 /DS0 O
24 1/2 EX1 56 /DS1 O Drive select
25 VCC1 - Power supply 57 /DS2 O
26 NUM1 I 58 /DS3 O
27 NUM3 I 59 VSS8 - Ground
28 IFS I Host interface select 60 /MON0 O
29 SFORM I Format data 61 /MON1 O Motor on
30 /INP I Index pulse 62 /MON2 O
31 /READY I Ready from FDD 63 /MON3 O
32 /WPRT I Write control signal 64 VSS9 - Ground