USB-100 Fujitsu Semiconductor America Inc, USB-100 Datasheet - Page 59

• Manufacturer Part Number: USB-100
• Description: KIT STARTER FOR USB
• Manufacturer: Fujitsu Semiconductor America Inc
• Type: MCUr

Specifications of USB-100

• Contents: Board, Cable
• For Use With/related Products: MB91F662
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 865-1108

4.5
4.6
transfer rate when connected to the host by using a pull-up resistor.
line that is pulled up, and selects its data transfer rate accordingly.
a maximum of 3 meters for Low Speed rates.
Additionally, cable lengths are standardized to a maximum of 5 meters for Full Speed rates, and
USB transfer rates are standardized as shown below.
The USB standard requires that USB devices allow for the automatic detection of their data
- A Full Speed device pulls up the D+ signal line with a 1.5 kΩ (R2) resistor.
- A Full Speed device pulls up the D- signal line with a 1.5 kΩ (R2) resistor.
(Transfer rate types will be discussed later.)
After the USB device is connected, the host detects whether it is the D+ signal line or D- signal
USB 1.0/1.1
USB 2.0
Transfer rate
Transfer rate detection
Figure 4.6-1 Differences in connection based on transfer rates
Low Speed
1.5 Mbps
1.5 Mbps
The MB91F662 supports only Full Speed.
Table 4.5-1. USB Transfer rates
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Full Speed
12 Mbps
12 Mbps
High Speed
-
480 Mbps