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APPENDIX D: Board Layout
Appendix D: Board Layout
Figure D-1. Board Layout.
X1
X2
16C554 U9
X4
X3
16C554 U12
C14
C13
U5
75232
C5
C6
U1
75232
C1
U6
75232
C7
U2
75232
C2
U7
75232
C8
U3
75232
C3
U8
75232
C9
U4
75232
C4
U10
P2
C11
93CS4S
C10R1
C12
U11
C17
PC19050
P1
C15R2 R3 R4 R5 R6 R7
J1=Clock Divide Select
DIV1=Clock Divide by 1
DIV4=Clock Divide by 4
Standard Clock=DIV4
R8
C19
C22
C21
XC9536-7801
+
C18
C16
U13
74LS74
U14 U15
74LS04
J1
DIV1
DIV4
C20 R9
Y1