PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 527

• 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

22.4.3
In dual buffer mode, both USB memory pages (page 0 and page 1) are used for data
transfers. The logical assignment of the memory pages to CPU or USB module is
automatically switched. The following two figures show the buffer handling concept in
dual buffer mode for the USB module read access and USB write access.
Figure 22-12 USB Read Access in Dual Buffer Mode - Buffer Handling
Data Sheet
SOD = 1
Dual Buffer Mode
No
No
CPU page is empty : CBF = 0
CPU buffer is full : CBF = 1
CPU write access disabled
CPU write access enabled
CPU Buffer Handling
CPU writes 1 Byte
Yes
Yes
CPU buffer
USB page
EOD = 1
empty?
full?
Pages are
swapped
527
(CBF = 1 and UBF = 0)
USB buffer is empty: UBF = 0
USB read access disabled
USB page is full : UBF = 1
USB read access enabled
USB Buffer Handling
USB reads buffer
Yes
Yes
USB read
CPU page
request?
full?
No
No
USB Module
PSB 21473
MCB03405
2003-03-31
INCA-D