h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 607
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h8s-2158
Manufacturer Part Number
h8s-2158
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2158.pdf
(927 pages)
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18.2
Table 18.1 shows the USB pin configuration.
Table 18.1 Pin Configuration
18.3
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.
Name
External clock input
pin
Up-stream data +
pin
Up-stream data +
pin
Bus driver power
supply pin
Bus driver ground
pin
Register Descriptions
Input/Output Pins
Symbol
USEXCL
USDP
USDM
DrVCC
DrVSS
Input/Output Function
Input
Input/Output
Input/Output
Input
Input
Section 18 Universal Serial Bus Interface (USB)
I/O pin for USB serial data
I/O pin for USB serial data
USB external clock input pin
On-chip bus driver/receiver power supply pin
On-chip bus driver/receiver ground pin
Rev. 3.00 Jan 25, 2006 page 555 of 872
REJ09B0286-0300
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