Section 4 User Interface Circuit - Hitachi H8S/2212 Series User Manual

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.
H8S/2218
DrVcc
DrVss
USD+
USD-
UBPM
VBUS
USPND
D15 to D8
E6000 emulator HS2214EPI62H
Evaluation chip
D15/PD7
D8/PD0
14
HS2212ECH61H
0.1 µF
5
Vcc Vcc
47 kΩ
to
47 Ω
Figure 9 User Interface Signal
0.1 µF
8
User system
DrVcc
DrVss
USD+
USD-
UBPM
VBUS
USPND