Yamaha A4000, Service Manual, Page: 11 / 61

A5000/A4000
11
D65611GB-039-3B (XS323A00) ENI
PIN
NO. NAME I/O FUNCTION
PIN
NO. NAME I/O FUNCTION
1 CLRN I Clear Status 23 P3 I/O
2 E1A I Rotary Encoder 1 Input A 24 P4 I/O
3 E1B I Rotary Encoder 1 Input B 25 P5 I/O
4 E2A I Rotary Encoder 2 Input A 26 P6 I/O I/O Port
5 E2B I Rotary Encoder 2 Input B 27 P7 I/O
6 E3A I Rotary Encoder 3 Input A 28 D0 I/O
7 E3B I Rotary Encoder 3 Input B 29 D1 I/O
8 E4A I Rotary Encoder 4 Input A 30 GND - Ground
9 E4B I Rotary Encoder 4 Input B 31 D2 I/O
10 E5A I Rotary Encoder 5 Input A 32 D3 I/O CPU Data Bus
11 E5B I Rotary Encoder 5 Input B 33 D4 I/O
12 E6A I Rotary Encoder 6 Input A 34 GND - Ground
13 E6B I Rotary Encoder 6 Input B 35 D5 I/O
14 E7A I Rotary Encoder 7 Input A 36 D6 I/O CPU Data Bus
15 E7B I Rotary Encoder 7 Input B 37 D7 I/O
16 VDD - Power Supply 38 GND - Ground
17 GND - Ground 39 VDD - Power Supply
18 E8A I Rotary Encoder 8 Input A 40 A0 I Address Bus
19 E8B I Rotary Encoder 8 Input B 41 A1 I Address Bus
20 P0 I/O 42 WRN I Write Enable
21 P1 I/O I/O Port 43 RDN I Read Enable
22 P2 I/O 44 CSN I Chip Select
D65621GF-028-3B9 (XS370A00) SMI
PIN
NO. NAME I/O FUNCTION
PIN
NO. NAME I/O FUNCTION
1 LMA24 I 41 VDD - Power Supply
2 LMA23 I 42 L1RAS2 O RAS2 for LoMem SIMM 1
3 LMA22 I 43 L1RAS3 O RAS3 for LoMem SIMM 1
4 LMA21 I Low Memory Address 44 GND - Ground
5 LMA20 I 45 HDRAS0 O RAS for HiMem DRAM 0
6 LMA19 I 46 HDRAS1 O RAS for HiMem DRAM 1
7 LMA18 I 47 GND - Ground
8 HMA24 I 48 VDD - Power Supply
9 HMA23 I High Memory Address 49 LDRAS0 O RAS for LoMem DRAM 0
10 HMA22 I 50 LDRAS1 O RAS for LoMem DRAM 1
11 HMA21 I 51 LMA1 I Low Memory Address
12 GND - Ground 52 LMA0 I
13 HMA20 I 53 GND - No.53
14 HMA19 I High Memory Address 54 LMA1X O Low Memory Address Exchanged
15 HMA18 I 55 LMA0X O
16 RASN I Row Address Strobe 56 GND - Ground
17 H0RAS0 O RAS0 for HiMem SIMM 0 57 VDD - Power Supply
18 H0RAS1 O RAS1 for HiMem SIMM 0 58 HMA1 I High Memory Address
19 GND - Ground 59 HMA0 I
20 H0RAS2 O RAS2 for HiMem SIMM 0 60 HMA1X O High Memory Address Exchanged
21 H0RAS3 O RAS3 for HiMem SIMM 0 61 HMA0X O
22 GND - Ground 62 D0 I Data Input
23 VDD - Power Supply 63 D1 I
24 L0RAS0 O RAS0 for LoMem SIMM 0 64 GND - Ground
25 L0RAS1 O RAS1 for LoMem SIMM 0 65 D2 I
26 GND - Ground 66 D3 I Data Input
27 L0RAS2 O RAS2 for LoMem SIMM 0 67 D4 I
28 L0RAS3 O RAS3 for LoMem SIMM 0 68 D5 I
29 GND - Ground 69 A2 I Address
30 VDD - Power Supply 70 WRN I Write
31 H1RAS0 O RAS0 for HiMem SIMM 1 71 GND - Ground
32 H1RAS1 O RAS1 for HiMem SIMM 1 72 VDD - Power Supply
33 GND - Ground 73 CSN I Chip Select
34 VDD - Power Supply 74 A0 I Address
35 H1RAS2 O RAS2 for HiMem SIMM 1 75 A1 I
36 H1RAS3 O RAS3 for HiMem SIMM 1 76 MCLK I Clock (37MHz)
37 GND - Ground 77 SYI I Sync Clock (48kHz)
38 L1RAS0 O RAS0 for LoMem SIMM 1 78 HBANK O HiMem Bank Select 01/23
39 L1RAS1 O RAS1 for LoMem SIMM 1 79 LBANK O LoMem Bank Select 01/23
40 GND - Ground 80 REFRN O Refresh Timing
(IC11)
(IC516)