PEB20534H-10V2.1 Infineon Technologies, PEB20534H-10V2.1 Datasheet - Page 304

• Manufacturer Part Number: PEB20534H-10V2.1
• Description: Communication Controller 208-Pin FQFP
• Manufacturer: Infineon Technologies

Data Sheet
CAPP
CRCM
XCRC
CRC Append
In BISYNC mode the CRC generator can be activated:
CAPP=’0’
CAPP=’1’
CRC Mode Select
In BISYNC mode the CRC generator can be configured for two different
generator polynoms:
CRCM=’0’
CRCM=’1’
Transmit CRC Checking Mode
XCRC=’0’
XCRC=’1’
No CRC generation/checking is active in BISYNC mode.
The CRC generator is activated:
1. The CRC generator is initialized every time the
2. The CRC is automatically appended to the last
CRC-16:
The polynominal is x
CRC-CCITT:
The polynominal is x
The transmit checksum (2 or 4 bytes) is generated and
appended to the transmit data automatically.
The transmit checksum is not generated automatically.
The checksum is expected to be provided by software as
the last 2 or 4 bytes in the transmit data buffer.
Note: The transmitter does NOT check whether the
transmission of a new ’frame’ starts. The CRC
initialization value can be selected via bit ’CRL’ in
register CCR2 (for BISYNC operation).
transmitted data of a ’frame’.
number of data bytes makes sense, i.e. a valid
frame length.
304
16
16
+x
+x
15
12
Detailed Register Description
+x
+x
2
5
+1.
+1.
(bisync mode)
(bisync mode)
PEB 20534
PEF 20534
(hdlc mode)
2000-05-30