PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 531
PSB21473FV13XT
Manufacturer Part Number
PSB21473FV13XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.PSB21473FV13XT.pdf
(664 pages)
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
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If bit SOFDE is set, buffer switching is done automatically after SOF (start of frame) has
been detected by the USB. Figure 22-16 describes this functionality for USB read
access for this case. The buffer which contains the latest data from the CPU is tagged
valid for USB access (UBF=1) at
empty. After the USB read access has occured at
empty again (UBF=0) and can be swapped again as soon as the CPU has filled its buffer
(at
threshold is always active, but an occurrence of SOF (if SOFDE=1) or setting bit DONE
by software are used to tag the CPU buffer full before reaching MaxLen.
Figure 22-16 Dual Buffer Mode USB Read Access: Buffer Switching on SOF with
Data Sheet
MaxLen
Len1
Len2
MaxLen
Len1
Len2
3
). The number of bytes in the buffer is less or equal MaxLen. The MaxLen
USB read accesses
Data Bytes
Number of
CBF
UBF
= 0
= 0
SOF (n)
SOFDE=1
set
Frame n
Page 0
Page 1
1
and the buffers are swapped if the USB buffer is
SOF (n+1)
CPU write accesses
531
set
Swap
Buffer
1
2
UBF = 0
2
, this buffer assigned to USB is
Frame n+1
Page 0
Page 1
SOF (n+2)
USB Module
PSB 21473
set
3
Swap
Buffer
2003-03-31
MCT03409
INCA-D
Time
Time
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