psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 189

• Manufacturer Part Number: psb21391
• Description: Siemens Codec With Upn Transceiver
• Manufacturer: Infineon Technologies Corporation

7.0.12
Value after reset: 00
RBCH
OV
A ’1’ in this bit position indicates a message longer than (2
RBC11-8
Four most significant bits of the total number of bytes in a received message.
Note: Normally RBCH and RBCL should be read by the microcontroller after an RME-
7.0.13
Value after reset: FF
TEI1
TEI1 ... Terminal Endpoint Identifier
In all message transfer modes except in transparent modes 0, 1 and extended
transparent mode, TEI1 is used for address recognition. In the case of a two-byte
address field, it contains the value of the first programmable Terminal Endpoint Identifier
according to the ISDN LAPD-protocol.
In non-auto-modes with one-byte address field, TEI1 is a command address, according
to X.25 LAPB.
EA
This bit is set to ’1’ according to HDLC/LAPD.
Data Sheet
interrupt in order to determine the number of bytes to be read from the RFIFO, and
the total message length. The contents of the registers are valid only after an RME
or RPF interrupt, and remain so until the frame is acknowledged via the RMC bit
or RRES.
RBCH - Receive Frame Byte Count High
TEI1 - TEI1 Register 1
7
7
0
... Overflow
... Receive Byte Count
... Address field Extension bit
H
H
.
0
0
TEI1
OV
RBC11
179
Detalled Register Description
12
- 1) = 4095 bytes .
0
0
RBC8
EA
PSB 21391
PSB 21393
2001-03-07
WR (27
RD (27
H
H
)
)