pef20320 Infineon Technologies Corporation, pef20320 Datasheet - Page 160

• Manufacturer Part Number: pef20320
• Description: Multichannel Network Interface Controller For Hdlc With 32 Channels
• Manufacturer: Infineon Technologies Corporation

User’s Manual
FTDA:
ITBS:
Figure 80
Channel Specification
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Interrupt Mask
SFR:
IFC:
CH:
TE:
RE:
FIR:
FIT:
(R)
(T) Transmitter Interrupt
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Idle/Flag Change (R)
V.110 Frg. Chg. (R)
ERR Interrupt (T)
ERR Interrupt (R)
FI Interrupt (R)
FI Interrupt (T)
Receiver Interrupt
Short Frame (R)
First Transmit Descriptor Address points to the beginning of the transmit data
chaining list.
This descriptor is only interpreted with a fast transmit abort or a transmit jump
or a transmit initialization command. It is read but ignored with any other
transmit channel command.
Individual Transmit Buffer Size; for undisturbed transmission an on-chip
transmit buffer with a total size of 64 long words stores the data before
formatting and transmitting. The individual buffer size specifies the part of the
on chip transmit buffer allocated to the channel. This allows a variable data
buffer size if NITBS = 0, ITBS has to be set to 0 also; it is then read but
ignored. (see Chapter 2.3).
New Xmt. buffer size
New ITBS Value
(ITBS valid)
FRDA (First Receive Descriptor Address)
FTDA (First Transmit Descriptor Address)
Rcv./Xmt.
Rcv. Commands
(RI, RO, RA):
000 Rcv. Clear
001 Fast Rcv. Abort
010
011
100
101
110
111
First Xmt. Commands
(TI, TO, TA):
000
001
010 Xmt. OFF
011
100
101
110 Not Allowed
111 Not Allowed
2
(TH = 1) Xmt. Hold
nd Xmt. Commands
Xmt. Clear
Fast Xmt. Abort
Xmt. Abort
Xmt. Jump
Xmt. Init.
Rcv. OFF
Rcv. Abort
Rcv. Jump
Rcv. Init.
Not Allowed
Not Allowed
:
Commands
Transparent Mode Flags
Fill code for flags in
transp. mode A (TMA only)
CRC to/from Data Section
CRC Generated/Stripped
160
in this channel are inverted.
All Rcv. and Xmt. data Bits
16 Bit CRC (HDLC mode)
32 Bit CRC (HDLC mode)
(HDLC mode only)
TFLAG
CRC Select
CRC Polynom
Inversion
Detailed Register Description
0
1
TMR 1
TMB
0
1
0
ITBS (buffer size)
Transmission Rate of V.110/X30
0 0
0 1
1 0
1 1
TRV
600 bit/s, 7 Repetitions
1200 bit/s, 3 Repetitions
2400 bit/s, 1 Repetitions
no Repetition
4.8, 9.6, 19.2, 38.4 kbit/s,
Flag Adjustment/Filtering
FNUM interframe timefill
characters in HDLC mode,
or TFLAG filtering in TMA
Mode
Mode
0 0 TMA
0 1 TMB/TMR
1 0 V.110/X30
1 1 HDLC Mode
Interframe
Timefill
0
1
(HDLC mode)
PEB 20320
7E
FF
(flags)
(ones)
ITS08223
01.2000