PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 114

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Information about the received frame is available for the P when a RME interrupt is generated,
as shown in table 8.
Table 8
Receive Information at RME Interrupt
Information
First byte after flag
(SAPI of LAPD
address field)
Control field
Compressed control field
2
3
Type of frame
(Command/Response)
Recognition of SAPI
Recognition of TEI
Result of CRC check
(correct/incorrect)
Data available in RFIFO
(yes/no)
Abort condition detected
(yes/no)
Data overflow during
reception of a frame
(yes/no)
Number of bytes received
in RFIFO
Message length
2.8.4
A 2 32 byte FIFO buffer (transmit pools) is provided in the transmit direction.
If the transmit pool is ready (which is true after an XPR interrupt or if the XFW bit in STAR is
Semiconductor Group
nd
rd
byte after flag
byte after flag
Transmission of Frames
Register (adr.
SAPR
RHCR
RHCR
RHCR
RHCR
RSTA
RSTA
RSTA
RSTA
RSTA
RSTA
RSTA
RBCL
RBCL
RBCH
hex)
(26)
(29)
(29)
(29)
(29)
(27)
(27)
(27)
(27)
(27)
(27)
(27)
(25)
(25)
(2A)
Bit
–
–
–
–
–
C/R
SA1-0
TA
CRC
RDA
RAB
RDO
RBC4-0
RBC11-0
OV
114
Mode
Transparent mode 1
Auto mode, I (modulo 8) and U frames
Auto mode, I frames (modulo 128)
Non-auto mode, 1-byte address field
Non-auto mode, 2-byte address field
Transparent mode 1
Auto mode, 2 byte address field
Non-auto mode, 2-byte address field
Transparent mode 3
Auto mode, 2 byte address field
Non-auto mode, 2-byte address field
Transparent mode 3
All except transparent modes 2, 3
ALL
ALL
ALL
ALL
ALL
ALL
Functional Description