PEF 20525 F V1.3 Infineon Technologies, PEF 20525 F V1.3 Datasheet - Page 222
PEF 20525 F V1.3
Manufacturer Part Number
PEF 20525 F V1.3
Description
IC CTRL PPP/HDLC SERIAL TQFP-100
Manufacturer
Infineon Technologies
Datasheet
1.PEB_20525_F_V1.3.pdf
(252 pages)
Specifications of PEF 20525 F V1.3
Function
Serial Optimized Communications Controller
Interface
ASYNC, BISYNC, HDLC, PPP
Number Of Circuits
2
Voltage - Supply
3 V ~ 3.6 V
Current - Supply
50mA
Power (watts)
150mW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
100-LFQFP
Includes
Bit Processor Functions, Serial Communication Controllers (SCCs)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
PEF20525FV1.3X
PEF20525FV13XP
SP000007592
PEF20525FV13XP
SP000007592
- Current page: 222 of 252
- Download datasheet (4Mb)
6.3.2
The receive DMA support logic is able to limit its requesting for data transfers to a byte
count programmed in register
of handling maximum receive buffer sizes itself, this feature can be disabled by setting
bit
If a new packet is received by the SCC, the DMA support logic will request the external
DMA controller to move receive data out of the RFIFO.
Now there are two possible scenarios:
• If the maximum buffer size programmed in register
• If the end of a received packet/block is part of the curent DMA transfer, SEROCCO-H
If in packet oriented protocol modes (HDLC, PPP) the maximum receive buffer size
RMBS is chosen to be larger than the expected receive packets, each buffer will contain
the whole packet (see
Buffer Full (RBF) interrupt will never occur, simplifying the software. To ensure that no
packets exceeding the maximum buffer size are forwarded from the SCC to the RFIFO,
the receive packet length should be limited with registers RLCRL/RLCRH.
Data Sheet
transferred (only if
transfers and a Receive Buffer Full (RBF) interrupt is generated. The CPU now
updates the receive buffer base address in the external DMA controller and releases
the receive DMA control logic by setting the ’RE’ bit in register RMBSH. Optionally the
maximum buffer size value can be updated with the same register write access.
generates a Receive DMA Transfer End (RDTE) interrupt and stops operation. The
CPU now reads the received byte count from registers RBCL/RBCH. The receive
DMA support logic will not continue requesting for data transfer until it is set up again
with the ’RE’ command in register RMBSH.
RMBSH
:DRMBS to ’1’.
Data Reception (With External DMA Support)
RMBSH
Figure
RMBSL/RMBSH
:DRMBS = ’0’), SEROCCO-H stops requesting for data
57). In this case (or if
222
. If the external DMA controller is capable
RMBSH
RMBSL/RMBSH
:DRMBS = ’1’) a Receive
Programming
PEB 20525
PEF 20525
2000-09-14
has been
Related parts for PEF 20525 F V1.3
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
16-bit microcontroller with 2x2 KByte RAM
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
NPN silicon RF transistor
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
NPN silicon RF transistor
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
NPN silicon RF transistor
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
NPN silicon RF transistor
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
Si-MMIC-amplifier in SIEGET 25-technologie
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
IGBT Power Module
Manufacturer:
Infineon Technologies AG
Datasheet:
Part Number:
Description:
IC for switching-mode power supplies
Manufacturer:
Infineon Technologies AG
Datasheet: