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Section 3 User System Interface Circuit
Switches, protection circuits, and termination circuits are provided for this expansion I/O board
and used to connect signals to the user system interface cable. Figure 3.1 shows the user system
interface signal circuit.
E6000 (HS3664EPI61H or HS3664EPI62H)
H8/3664
HS36109EIO61H
H8/36109
User system
interface cable
Ports D, E, F, G, and H
Vcc
47 Ω
47 kΩ
Evaluation chip
Figure 3.1 User System Interface Signal Circuit (Ports D, E, F, G, and H)