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5-3. GATE ARRAY (IC15)
Pin description
PIN NO PIN NAME I / O DESCRIPTION PIN NO PIN NAME I / O DESCRIPTION
1 Vcc - VCC 51 A4 O ADDRESS (A4)
2 MTR_1R O MTR_R1 by Printer circuit 52 A3 O ADDRESS (A3)
3 MTR_2R O MTR_R2 by Printer circuit 53 A2 O ADDRESS (A2)
4 MTR_3R O MTR_R3 by Printer circuit 54 A1 O ADDRESS (A1)
5 MTR_4R O MTR_R4 by Printer circuit 55 A0 O ADDRESS (A0)
6 STB_R1 O STB_R1 by Printer 56 GND - Vss
7 STB_R2 O STB_R2 by Printer 57 Vcc - VDD
8 STB_R3 O STB_R3 by Printer 58 BA20 - Not used
9 STB_R4 O STB_R4 by Printer 59 BA19 O ADDRESS (A19)
10 STB_R5 O STB_R5 by Printer 60 GND - Vcc
11 STB_R6 O STB_R6 by Printer 61 BA18 O ADDRESS (A18)
12 GND - Vss 62 BA17 O ADDRESS (A17)
13 H_DAT O DI signa by Printer 63 BA16 O ADDRESS (A16)
14 H_CLK O CLK signal by Printer 64 BA15 O ADDRESS (A15)
15 MT_IRQ O MT_IRQ (to CPU) 65 BA14 O ADDRESS (A14)
16 CK1.25M I CLOCK (to CPU) 66 BA13 O ADDRESS (A13)
17 GA_TEST 'TEB) I Vss 67 BA12 O ADDRESS (A12)
18 RESET I RESET signal 68 GND - Vss
19 RD I Read signal for Memory 69 Vcc - VCC
20 Vcc - VCC 70 BA11 O ADDRESS (A11)
21 GND - Vss 71 ROM_CE O Chip enable for ROM
22 WR I Write signal for Memoey 72 GND - Vss
23 ASTB I ASTB (from CPU) 73 RAM1_CE O Chip enable for RAM1
24 RAM_Dis I Chip select for RAM 74 RAM2_CE O Chip enable for RAM2
25 A15 I ADDRESS (A15) 75 FIS_CE O Chip enable for FIS ROM
26 A14 I ADDRESS (A14) 76 STP_CE O Chip enable for RAM
27 A13 I ADDRESS (A13) 77 FLH_CE O Chip enable for FLASH ROM
28 A12 I ADDRESS (A12) 78 Vcc - VCC
29 A11 I ADDRESS (A11) 79 GND - Vss
30 A10 I ADDRESS (A10) 80 GND - Vss
31 A9 I ADDRESS (A9) 81 Vcc - VCC
32 A8 I ADDRESS (A8) 82 KI1 I KEY in signal
33 AD7 I/O DATA BUS (AD7) 83 KI2 I KEY in signal
34 AD6 I/O DATA BUS (AD6) 84 KI3 I KEY in signal
35 AD5 I/O DATA BUS (AD5) 85 KI4 I KEY in signal
36 AD4 I/O DATA BUS (AD4) 86 KI5 I KEY in signal
37 AD3 I/O DATA BUS (AD3) 87 KI6 I KEY in signal
38 AD2 I/O DATA BUS (AD2) 88 KI7 I KEY in signal
39 AD1 I/O DATA BUS (AD1) 89 KI8 I KEY in signal
40 Vcc - Vcc 90 S1A (KC_1) O KEY scan signal
41 GND - Vss 91 S1B (KC_2) O KEY scan signal
42 GND - Vss 92 S1C (KC_3) O KEY scan signal
43 ADO I/O DATA BUS (AD0) 93 S1D (KC_4) O KEY scan signal
44 SMA I CP4 terminal 94 S1E (KC_5) O KEY scan signal
45 SIN I CP5 terminal 95 S1F (KC_6) O KEY scan signal
46 SOUT O CP6 terminal 96 S1G (KC_7) O KEY scan signal
47 A7 O ADDRESS (A7) 97 A1DP (KC_8) O KEY scan signal
48 GND - Vss 98 S2A (KC_9) O KEY scan signal
49 A6 O ADDRESS (A6) 99 S2B (KC_10) O KEY scan signal
50 A5 O ADDRESS (A5) 100 Vcc - VCC
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