Section 4 User Interface Circuit
The user system interface cable includes the H8S/2218 microcomputer to emulate the USB
function. The H8S/2212 user interface signal includes a interface circuit as shown in figure 9.
14
H8S/2218
0.1
µ
F
5
0.1
µ
F
DrVcc
DrVss
D15 to D8
47
Ω
47 k
Ω
Vcc Vcc
D15/PD7
D8/PD0
to
Evaluation chip
E6000 emulator HS2214EPI62H
USD+
USD-
UBPM
VBUS
USPND
USD+
USD-
UBPM
VBUS
USPND
DrVcc
DrVss
HS2212ECH61H
8
User system
Figure 9 User Interface Signal