User`s manual

Section 4 User System Interface Circuits
Rev. 3.00 Oct. 17, 2008 Page 66 of 66
REJ10J1662-0300
DrVCC
3.3 V
USD+
USD-
SH7280
N.C.
N.C.
N.C.
DrVSS
VBUS
USBEXTAL
USBXTAL
DrVCC
USD+
USD-
DrVSS
VBUS
USBEXTAL
USBXTAL
48 MHz
EP1S10
CB3T16211
MAX709R
User system
100 kΩ
220 Ω
47 Ω
Figure 4.7 User System Interface Circuits
4.2 Delay Time for the User System Interface
Since the _RES and NMI signals are connected to the user system via the logic on the EV-chip
unit, a delay time shown in table 4.1 will be generated until the signal is input from the user
system to the MCU.
Table 4.1 Delay Time for Signals via the EV-chip Unit
No. Signal Name Delay Time (ns)
1 _RES 24
2 NMI 21