Section 18 Universal Serial Bus Interface (USB)
Rev. 3.00 Jan 25, 2006 page 555 of 872
REJ09B0286-0300
18.2
Input/Output Pins
Table 18.1 shows the USB pin configuration.
Table 18.1 Pin Configuration
Name
Symbol
Input/Output Function
External clock input
pin
USEXCL
Input
USB external clock input pin
Up-stream data +
pin
USDP
Input/Output
I/O pin for USB serial data
Up-stream data +
pin
USDM
Input/Output
I/O pin for USB serial data
Bus driver power
supply pin
DrVCC
Input
On-chip bus driver/receiver power supply pin
Bus driver ground
pin
DrVSS
Input
On-chip bus driver/receiver ground pin
18.3
Register Descriptions
In the USB protocol, the host sends a token to initiate a unit of data transmission (transaction). A
transaction consists of a token packet, data packet, and handshake packet. A token packet contains
information relating to the device addresses and endpoints, and transfer type. A data packet
contains data. A handshake packet includes information relating to the transmission success or
failure.
To transfer data from the host to the slave, the host first sends an OUT or SETUP token and then
sends data to the slave (OUT transaction or SETUP transaction). To transfer data from the slave to
the host, the host first sends an IN token to the slave and then waits for data sent from the slave
(IN transaction).
In the following descriptions, IN and OUT operations based on the host may be described as input
and output. In addition, host input transfer may be referred to as IN (IN transaction, IN-FIFO, or
EP0in). Host output transfer may be referred to as OUT (OUT transaction, OUT-FIFO, or
EP0out).
On the other hand, transmission (send) and reception (receive) mean transmission and reception
based on the USB module or slave CPU unless it is noted as transmission by the host or reception
by the host.
Summary of Contents for H8S/2158
Page 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
Page 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Page 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
Page 54: ...Rev 3 00 Jan 25 2006 page lii of lii...
Page 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Page 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Page 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Page 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Page 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Page 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Page 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Page 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Page 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Page 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Page 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Page 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Page 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Page 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Page 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...