PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 532

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
If the number of data bytes to be transferred is greater than the maximum packet size
(given by MaxLen), the data is split up automatically into packets, which are transferred
one after the other. Figure 22-17 gives an example of an USB read access, where data
from the CPU is split up into two packets. When MaxLen is reached during the CPU write
access, the currently active buffer is switched to USB side (UBF=1). The CPU continues
writing data to the buffer. When the complete data packet has been written to the buffer
by the CPU, bit DONE is set by software to indicate the end of the data packet (CBF=1).
In the example, the USB buffer has not been read out. It is still full for the USB and can
not be swapped (CBF=UBF=1). When the USB read access has occured (CBF=0), the
buffers are automatically swapped and bit SOD is set.
Figure 22-17 Double Buffer Mode USB Read Access: Data Length greater than
MaxLen
MaxLen
USB read accesses
Data Bytes
Number of
UBF
CBF
= 0
= 0
SOF (n)
set
Packet Length (MaxLen)
1
Page 0
Page 1
Frame n
UBF = 1
Swap
Buffer
DONE = 1
EOD = 1
CBF = 1
SOF (n+1)
CPU write accesses
532
set
Page 0
Page 1
Swap
Buffer
UBF = 1
SOD = 1
Frame n+1
Page 0
Page 1
SOF (n+2)
USB Module
set
PSB 21473
2003-03-31
MCT03410
INCA-D
Time
Time