PEF20525 INFINEON [Infineon Technologies AG], PEF20525 Datasheet - Page 224
![no-image](/images/no-image-200.jpg)
PEF20525
Manufacturer Part Number
PEF20525
Description
2 Channel Serial Optimized Communication Controller for HDLC/PPP
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.PEF20525.pdf
(252 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PEF20525EHV1.3
Manufacturer:
IR
Quantity:
22 409
Company:
Part Number:
PEF20525F
Manufacturer:
infineon
Quantity:
4
- Current page: 224 of 252
- Download datasheet (4Mb)
Figure 58
After the external DMA controller is initialized with the base address of receive buffer #1
and the maximum buffer size RMBS is written to SEROCCO-H, simultaneously activated
with the ’RE’ command, requesting of DMA transfer from the RFIFO to the receive buffer
takes place in blocks of 32 bytes (unless changed with bit field ’RFTH’ in register
CCR3H
After four 32-byte-blocks have been transferred, the first receive buffer is filled up
completely with receive data. The SEROCCO-H indicates this by generating the RBF
interrupt.
Now the CPU has to provide the base address of the second receive buffer to the
external DMA controller and issue the ’RE’ command to SEROCCO-H again. This allows
the external DMA controller to continue data transfers into the second receive buffer.
After another two 32-byte-blocks have been transferred, the DMA request for the
remaining 7 bytes (including the
follwed by the generation of the RDTE interrupt. Now the DMA transfer is completed and
software has to read the number of received bytes from the Receive Byte Count registers
RBCL/RBCH.
The following figure
SEROCCO-H and the CPU for this example (fragmented reception of 199 bytes into two
receive buffers):
Data Sheet
Receive Buffers
in Memory
Packet
).
Fragmented Reception per DMA (Example)
128
(Figure
...
1
1st packet
fragment
32
59) gives the sequence of actions from both, the
RSTA
32
byte) is generated to the external DMA controller,
199 Bytes Payload
224
32
128
32
1
2nd packet
fragment
32
32
7
...
Programming
PEB 20525
PEF 20525
2000-09-14
Related parts for PEF20525
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![PEF-03A](/images/no-image3.png)
Part Number:
Description:
PHASE SHIFTERS
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
![PEF-03A-1500B](/images/no-image3.png)
Part Number:
Description:
PHASE SHIFTERS
Manufacturer:
MERRIMAC [Merrimac Industries, Inc.]
Datasheet:
![BFP620](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
![BG3123R](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
![BG3130](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
![BG3130R](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
![BG3230](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
![BGA428](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
![BGA616](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
![SAB-C167CR-LM](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
16-bit microcontroller with 2x2 KByte RAM
Manufacturer:
Infineon Technologies AG
Datasheet:
![BFP182W](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
NPN silicon RF transistor
Manufacturer:
Infineon Technologies AG
Datasheet:
![BFP193W](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
NPN silicon RF transistor
Manufacturer:
Infineon Technologies AG
Datasheet:
![BFP450](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
NPN silicon RF transistor
Manufacturer:
Infineon Technologies AG
Datasheet:
![BFP520](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
NPN silicon RF transistor
Manufacturer:
Infineon Technologies AG
Datasheet:
![BGA420](/images/manufacturer_photos/0/3/328/infineon_technologies_ag_tmb.jpg)
Part Number:
Description:
Si-MMIC-amplifier in SIEGET 25-technologie
Manufacturer:
Infineon Technologies AG
Datasheet: