HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 836
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417641.pdf
(1036 pages)
- Current page: 836 of 1036
- Download datasheet (5Mb)
Section 20 USB Function Module
20.8
Example of USB External Circuitry
USB Transceiver: When an on-chip transceiver is not used, a USB transceiver IC (such as a
PDIUSBP11) must be connected externally. The USB transceiver manufacturer should be
consulted concerning the recommended circuit from the USB transceiver to the USB
connector, etc.
D+ Pull-Up Control: In a system where it is wished to delay USB host/hub connection
notification (D+ pull-up) (during high-priority processing or initialization processing, for
example), D+ pull-up is controlled using a general output port. When the USB cable has been
connected to the host or hub and D+ pull-up is inhibited, D+ and D- are placed in the low level
state (D+ and D- are pull down on the host or hub side) and the USB module recognizes as if the
USB bus reset has been received from the host. In that case, the D+ pull-up control signal and
VBUS pin input signal should be controlled using a general output port and the USB cable VBUS
(AND circuit) as shown in figure 20.17. (The UDC core of this LSI holds the powered state
independent of D+ and D- state when the VBUS pin is low level.)
Detection of USB Cable Connection/Disconnection: As USB states are managed by hardware in
this module, a VBUS signal that recognizes connection/disconnection is necessary. The power
supply signal (VBUS) in the USB cable is used for this purpose. However, if the cable is
connected to the USB host/hub when the on-chip function LSI power is off, a voltage (5 V) will be
applied from the USB host/hub. Therefore, an IC (HD74LV1G08A, 2G08A, etc.) that allows
voltage application when the system power is off should be connected externally.
Rev. 4.00 Sep. 14, 2005 Page 786 of 982
REJ09B0023-0400
Related parts for HD6417641
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Renesas Technology Corp [Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series]
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
RENESAS MCU
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet:
Part Number:
Description:
Renesas 32-Bit RISC Microcomputer
Manufacturer:
RENESAS [Renesas Technology Corp]
Datasheet: