Yamaha RM1x, Service Manual

Page: 15 / 54

RM1x
15
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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 Data bus output for 4 bit dot
3 VA3 O VRAM address bus 33 XD0 O
4 VA2 O 34 XECL O S driver enable, chain clock
5 VA1 O 35 XSCL O Data bus shift clock
6 VA0 O 36 Vss - Ground
7 /VWR O VRAM read/write 37 LP O X driver latch pulse
8 /VCE O Memory control 38 WF O Frame signal for X/Y driver
9 /VRD - Not used 39 YDIS O
Power down signal for displaying off mode
10 /RES I Initial clear 40 YD O Scan start signal
11 NC - Not used 41 YSCL O Scan shift clock
12 NC - Not used 42 VD7 I/O
13 /RD I Read strobe 43 VD6 I/O
14 /WR I Write strobe 44 VD5 I/O
15 SEL2 I Bus select 45 VD4 I/O VRAM data bus
16 SEL1 I Bus select 46 VD3 I/O
17 OSC1 I Clock 47 VD2 I/O
18 OSC2 O Clock 48 VD1 I/O
19 /CS I Chip select 49 VD0 I/O
20 A0 I Data mode select 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 Data bus 55 VA10 O
26 D4 I/O 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 Data bus output for 4 bit dot 60 NC - Not used
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SED1335FOB (XQ595A00) LCDC
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 33 XD0 O
4 VA2 O 34 XECL O Xdriver Enable Change Clock
5 VA1 O 35 XSCL O Xdriver Shift Clock
6 VA0 O 36 Vss - Groud
7 /VWR O VRAM Write Signal 37 LP O Latch Pulse
8 /VCE O VRAM Chip enable 38 WF O Frame Signal
9 NC - 39 YDIS O LCD Power Down Output
10 /RES I Reset Input Signal 40 YD O Scan Start Pulse
11 NC - 41 YSCL O Scan Sift Clock
12 NC - 42 VD7 I/O
13 /RD I Read Signal 43 VD6 I/O
14 /WR I Write Signal 44 VD5 I/O
15 SEL2 I Bus Select 45 VD4 I/O
16 SEL1 I Bus Select 46 VD3 I/O
17 OSC1 I Oscillator1 47 VD2 I/O
18 OSC2 O Oscillator2 48 VD1 I/O
19 /CS I Chip Select Input Signal 49 VD0 I/O
20 A0 I Data Bus Signal Kind Judgement 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
25 D3 I/O 55 VA10 O
26 D4 I/O 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 -
VRAM Address Bus
VRAM Data Bus
VRAM Address Bus
Data Bus for System