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SH7721 Datasheet(PDF) 821 Page - Renesas Technology Corp

Part # SH7721
Description  Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
PDF  1524 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7721 Datasheet(HTML) 821 Page - Renesas Technology Corp

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Section 23
USB Pin Multiplex Controller
Rev. 3.00 Jan. 18, 2008 Page 759 of 1458
REJ09B0033-0300
23.4
Examples of External Circuit
23.4.1
Example of the Connection between USB Function Controller and Transceiver
Figures 23.2 and 23.3 show example connections of USB function controller and transceiver.
Figures 23.2 shows connections when using the on-chip USB transceiver. Figures 23.3 shows
connections when not using the on-chip USB transceiver. When using the USB function
controller, the signals must be input to the cable connection monitor pin UJBF_VBUS. The
USBF_VBUS pin is multiplexed with the
USB1_ovr_current pin, and writing 1 to bit 0
(USB_SEL) of UTRCTL selects the USBF_VBUS pin functions. According to the status of the
USBF_VBUS pin, the USB function controller recognizes whether the cable is
connected/disconnected. Also, pin D+ must be pulled up in order to notify the USB host/hub that
the connection is established. The sample circuits in figures 23.2 and 23.3 use the USB1_pwr_en
pin for pull-up control.
This LSI
USB function
USB connector
IC allowing voltage
application when
system power is off
USB1_pwr_en
USBF_VBUS
USB1_P
USB1_M
VBUS
IC1
IC allowing voltage
application when
system power is off
IC2
D
+
D
−
GND
USB1d_SPEED
USB1d_TXENL
USB1d_TXDPLS
USB1d_TXSEO
USB1d_RCV
USB1d_DPLS
USB1d_DMNS
USB1d_SUSPEND
3.3V
5V
1.5k
Ω
27
Ω
27
Ω
Figure 23.2
Example 1 of Transceiver Connection for USB Function Controller
(On-Chip Transceiver is Used)



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