Datasheet

Table Of Contents
Section 15 Universal Serial Bus Interface (USB)
REJ09B0140-0900 Rev. 9.00 Page 589 of 846
Sep 16, 2010
H8S/2215 Group
Regulator
0: Bus-powered mode
External transceiver
(ISP1104 manufactured by NXP)
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
VCC
(3.3 V)
VCC
GND
MODE
VSS
USB connector
*
1
USB
Step-down to the operating voltage VCC (3.3 V) of this LSI.
To protect the LSI, voltage applicable IC such as HD74LV-A series must be used
even when the system power is turned off.
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.
Pull-up control
external circuit
for full speed
1.
2.
3.
4.
VCC
(3.3 V)
VCC
*
2
SPEED
VCC
Pxx
(P36)
*
3
*
4
Notes:
Figure 15.32 USB External Circuit in Bus-Powered Mode
(When External Transceiver Is Used)