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SH7721 Datasheet(PDF) 817 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) 817 Page - Renesas Technology Corp

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Section 23
USB Pin Multiplex Controller
Rev. 3.00 Jan. 18, 2008 Page 755 of 1458
REJ09B0033-0300
Section 23
USB Pin Multiplex Controller
23.1
Features
The USB multiplex controller controls the data path to USB transceiver from USB host controller
port 1 or USB function controller.
Both USB host port 1 and USB function controller are connected to USB transceiver 1 via
multiplexer that is controlled by UTRCTL register. The USB host controller port 2 and USB
transceiver 2 are connected one-to-one. USB transceiver 1 can be connected to USB host
controller or USB function controller, while USB transceiver 2 can only be connected to the USB
host controller. Because these ports and transceivers are controlled individually, USB transceiver 2
can be connected to either the USB host controller or the USB function controller regardless its
status. The signals to USB transceiver are used as external pins USB1d _**** which are
multiplexed with pins 113 to 123.
Figure 23.1 shows the connections between the on-chip USB host controller of this LSI, the USB
function controller, and the on-chip 2-port USB transceiver.
USB host
USB function
pwr_en
USB2_pwr_en
USB2_ovr_current
USB2_P
USB2_M
USB1_pwr_en/USBF_UPLUP
USB1_ovr_current/
USBF_VBUS
USB1d_****
USB1_P
USB1_M
pwr_en
VBUS
pwr_en/
pull-up control pin
multiplexer
USB
host/function
transceiver
signals
multiplexer
ovr_current/
VBUS
multiplexer
ovr_current
ovr_current
Transceiver signal
USB digital signal
Transceiver signal
Control
Port 1
Port 2
USB
transceiver
2
USB
transceiver
1
Power
Power
Control
transceiver
Control
transceiver
Port 1
Power
Control
transceiver
Selector
Selector
Figure 23.1
Block Diagram of USB PIN Multiplexer



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