HD6417727BP160CV Datasheet, PDF (747/1098 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/ SH7700 Series

Section 22 USB Pin Multiplex Controller
22.3.2 Example of the Connection between USB Host Controller and Transceiver
Figures 22.6 and 22.7 show example connections of the USB host controller and transceiver.
Figure 22.6 shows an example connection using the built-in transceiver 1. By using the
USB2_ovr_current, USB2_pwr_en, USB2_P, and USB2_M pins in an external circuit similar to
that in figure 22.6, you can also use built-in USB transceiver 2. Figure 22.7 shows an example
connection when not using the built-in USB transceiver. When using the USB host controller, a
separate LSI must be used for USB power bus control (equivalent to the USB power control LSIs
in figures 22.6 and 22.7). Make sure the LSI has the power supply capacity to satisfy the USB
standard, and select one that has an overcurrent protection function. Configure the system so that
the input to the USB1_ovr_current pin is Low on detection of an overcurrent.
SH7727
USB host
USB1_ovr_current
USB1_pwr_en
USB
power control
LSI
USB connector
5V
GND
27Ω
USB1_P
D+
15kΩ
27Ω
USB1_M
D−
15kΩ
Figure 22.6 Example 1 of Transceiver Connection for USB Host Controller
(On-chip transceiver is used)
Rev.6.00 Mar. 27, 2009 Page 689 of 1036
REJ09B0254-0600