Datasheet

Table Of Contents
Section 15 Universal Serial Bus Interface (USB)
Page 590 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
1.5 kΩ
DrVCC
(3.3 V)
VBUS
(5 V)
D+
Rs Rs
D-
D+ D-
DrVSS
P12
P11
P10
P13
P15
P17
PA3
RCV
VP
VM
VPO
FSE0
OE
SUSPND
GND
UBPMVBUS
IRQx
VCC
(3.3 V)
VCC
3.3 V
VCC
GND
MODE
VSS
USB connector
*
1
*
2
*
4
USB
Notes:
1: Self-powered mode
VCC
To protect the LSI, voltage applicable IC such as HD74LV-A series must be used
even when the system power is turned off.
To cancel software standby state by detecting the USB cable disconnection, the VBUS
signal must also be connected to the IRQx pin (Note that the software standby
state cannot be canceled by the USB internal interrupt EXIRQx).
In HD64F2215, HD64F2215R, HD64F2215T, HD6432215B, and HD6432215C,
Pxx should be assigned to an output port as the D+ pull-up control pin.
In HD64F2215U, HD64F2215RU, HD64F2215TU and HD64F2215CU, in which on-chip ROM can be
programmed by using the USB, P36 should be used as the D+ pull-up control pin.
Steps should be taken prevent noise from affecting the VBUS terminal during USB communications.
1.
2.
3.
4.
Pull-up control
external circuit
for full speed
External transceiver
(ISP1104 manufactured by NXP)
*
1
VCC
SPEED
VCC
Pxx
(P36)
*
3
Notes:
Figure 15.33 USB External Circuit in Self-Powered Mode
(When External Transceiver Is Used)