PEF20525 INFINEON [Infineon Technologies AG], PEF20525 Datasheet - Page 129
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: 129 of 252
- Download datasheet (4Mb)
Data Sheet
Receive FIFO (RFIFO)
Reading data from the RFIFO can be done in 8-bit (byte) or 16-bit (word) accesses,
depending on the selected microprocessor bus width using signal ’WIDTH’. In 16-bit bus
mode only 16-bit accesses to RFIFO are allowed. Only for a frame with odd byte count
the last access can be an 8-bit access.
Note: The ’WIDTH’ signal is available for the P-TQFP-100-3 package only. With the P-
The size of the accessible part of RFIFO is determined by programming the RFIFO
threshold level in bit field CCR3H.RFTH(1:0). The threshold can be adjusted to 32 (reset
value), 16, 4 or 2 bytes.
• Interrupt Controlled Data Transfer (GMODE.EDMA=’0’)
Up to 32 bytes/16 words of received data can be read from the RFIFO following an RPF
or an RME interrupt (see
access is not incremental; it is always 10
RPF Interrupt: This interrupt indicates that the adjusted receive threshold level is
reached. The message is not yet complete. A fix number of bytes, dependent from the
threshold level, has to be read.
RME Interrupt: The message is completely received. The number of valid bytes is
determined by reading the RBCL,
The content of the RFIFO is released by issuing the “Receive Message Complete”
command (CMDRH.RMC).
• DMA Controlled Data Transfer (GMODE.EDMA=’1’)
If DMA operation is enabled, the SEROCCO-H autonomously requests data transfer by
asserting the DRR line to the external DMA controller. The DRR line remains active until
the beginning of the last receive data byte/word transfer. For a detailed decsription of the
external DMA interface operation refer to
Page
Transmit FIFO (XFIFO)
Writing data to the XFIFO can be done in 8-bit (byte) or 16-bit (word) accesses,
depending on the selected microprocessor bus width using signal ’WIDTH’. In 16-bit bus
mode only 16-bit accesses to XFIFO are allowed. Only for a frame with odd byte count
the last access must be an 8-bit access.
Note: The ’WIDTH’ signal is available for the P-TQFP-100-3 package only. With the P-
• Interrupt Controlled Data Transfer (GMODE.EDMA=’0’)
Following an XPR (or an ALLS) interrupt, up to 32 bytes/16 words of new transmit data
can be written into the XFIFO. Transmit data can be released for transmission with an
80.
LFBGA-80-2 package only 8-bit accesses are supported.
LFBGA-80-2 package only 8-bit accesses are supported.
ISR0
register). The address provided during an RFIFO read
RBCH
H
5-129
registers.
for channel A or 60
“External DMA Controller Support” on
Register Description (FIFOH)
H
for channel B.
PEB 20525
PEF 20525
2000-09-14
Related parts for PEF20525
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
PHASE SHIFTERS
Manufacturer:
ETC2 [List of Unclassifed Manufacturers]
Datasheet:
Part Number:
Description:
PHASE SHIFTERS
Manufacturer:
MERRIMAC [Merrimac Industries, Inc.]
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:
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: