peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 248

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

HA1...0…
LA…
Receive Byte Count Low (Read)
Data Sheet
RBCL
RBC7
7
Significant only if 2-byte address mode has been selected.
In operating modes which provide high byte address recognition, the
FALC
contents of two individually programmable registers (RAH1, RAH2)
and the fixed values FE
Dependent on the result of this comparison, the following bit
combinations are possible:
Note: If RAH1, RAH2 contain identical values, a match is indicated
Low Byte Address Compare
Significant in HDLC modes only.
The low byte address of a 2-byte address field, or the single address
byte of a 1-byte address field is compared with two registers. (RAL1,
RAL2).
Together with RBCH (bits RBC11...8) indicates the length of a
received frame (1…4095 bytes). Bits RBC4-0 indicate the number of
valid bytes currently in RFIFO. These registers must be read by the
CPU following an RME interrupt.
High Byte Address Compare
00… RAH2 has been recognized
01… Broadcast address has been recognized
10… RAH1 has been recognized C/R = 0 (bit 1)
11… RAH1 has been recognized C/R = 1 (bit 1)
0…
1…
®
RAL2 has been recognized
RAL1 has been recognized
-LH compares the high byte of a 2-byte address with the
by ‘10’ or ‘11’.
248
H
and FC
H
(broadcast address).
FALC-LH V1.3
RBC0
E1 Registers
0
PEB 2255
2000-07
(66)