HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 546
HD6417660
Manufacturer Part Number
HD6417660
Description
Renesas 32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417660.pdf
(846 pages)
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18.5
Usage Notes
About the Examples of External Circuit: These examples of connection with an external circuit
in this chapter are for reference only, therefore proper operation is not guaranteed with these
circuit examples. If system countermeasures are required for external surges and ESD noise, use a
protective diode, etc.
About the Clock Input to the USB: When the USB clock is generated internally, the clock
source is generated not by an input clock from the EXTAL pin specified as the CPU clock source
but an input clock by the RDI_REFCLK_IN pin specified as clock used for data I/O with the RF-
IC of the Bluetooth and the link controller. To use the USB function of this LSI without being
connected to the RF-IC of the Bluetooth, the USB should be input the 13-MHz clock conforming
to the USB standard by the RDI_REFCLK_IN pin. To use the USB function of this LSI without
being connecting to the RF-IC of the Bluetooth actually, input of 48-MHz clock conforming to the
USB standard by means of the UCLK pin is recommended.
Problems with Using Non-specified Commercial USB Cable: Some USB cables on the market
do not meet the specification, and there are confirmed cases of non-specified USB cable to have
problems with connectivity.
Use only specified USB cable with this product.
Rev. 1.00, 02/04, page 508 of 804
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