GMS81C50 Datasheet, PDF (96/99 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCONTROLLERS

Appendix B. Programmer’s guide
1. General Circuit Diagram of GMS81C50 series
VCC
VCC
4MHz
OSC
vcc
1 R00
2 R01
3 R02
4 R03
5 R04
6 R05
7 R06
8 R07
9 R34
10 R35
11 VDD
12 R36
13 R37
14 XOUT
15 XIN
16 R10
17 R11
18 ^R12
19 ^R13
20 TEST
R27 ⁴⁰
R26 39
R25 38
R24 37
R23 36
R22 35
R21 34
R20 33
R33 32
VSS 31
R32 30
R31 29
R30 28
R17 27
R16 26
R40 25
REMOUT 24
R15 ₂₃
R14 22
RESET 21
Filter for Vcc-GND
noise
Infrared LED
0.1uF
TR1
GND
121 113 105 97 89 ^{81 73 65 57 49 41 33 25 17 9 1 R00}
122 114 106 98 90 ^{82 74 66 58 50 42 34 26 18 10 2 R01}
123 115 107 99 91 ^{83 75 67 59 51 43 35 27 19 11 3 R02}
124 116 108 100 92 ^{84 76 68 60 52 44 36 28 20 12 4 R03}
125 117 109 101 93 ^{85 77 69 61 53 45 37 29 21 13 5 R04}
126 118 110 102 94 ^{86 78 70 62 54 46 38 30 22 14 6 R05}
127 119 111 103 95 ^{87 79 71 63 55 47 39 31 23 15 7 R06}
128 120 112 104 96 ^{88 80 72 64 56 48 40 32 24 16 8 R07}
B-1