DS72030W200FPV Renesas Electronics America, DS72030W200FPV Datasheet - Page 1258

Manufacturer Part Number

DS72030W200FPV

MPU, 32BIT, SH7203, ROMLESS, 240QFP

Manufacturer

Renesas Electronics America

Program Memory Size

Digital Ic Case Style

Supply Voltage Range

1.1V To 1.3V

Operating Temperature Range

-20Â°C To +85Â°C

Rohs Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Section 23 USB 2.0 Host/Function Module (USB)

When the function controller function is selected and if data could not be received at intervals of 1

ms (when using full-speed operation) or 125 μs (when using high-speed operation) because an

SOF packet was corrupted or missing, this module interpolates the SOF. The SOF interpolation

operation begins when USBE = 1, SCKE = 1 and an SOF packet is received. The interpolation

function is initialized under the following conditions.

• Power-on reset

• Software reset

• USB bus reset

• Suspended state detected

Also, the SOF interpolation operates under the following specifications.

• 125 μs/1 ms conforms to the results of the reset handshake protocol.

• The interpolation function is not activated until an SOF packet is received.

• After the first SOF packet is received, either 125 μs or 1 ms is counted with the USB clock of

• After the second and subsequent SOF packets are received, interpolation is carried out at the

• Interpolation is not carried out in the suspended state or while a USB bus reset is being

Rev. 3.00 Sep. 28, 2009 Page 1226 of 1650

REJ09B0313-0300

Normal transfer

Token corrupted

Packet inserted

Frame misaligned

Token delayed

48 MHz, and interpolation is carried out.

previous reception interval.

received. (With suspended transitions in high-speed operation, interpolation continues for 3 ms

after the last packet is received.)

Figure 23.19 Example of an Interval Error Being Generated when IITV = 1

SOF Interpolation Function