
SCC Programming Reference
MOTOROLA
MC68360 USER’S MANUAL
E-7
NOF3-NOF0—Number of Flags
Minimum number of flags between frames or before frames specifies the number of flags
(0-15) to be inserted between frames or before a frame is transmitted.
C32—CRC16/CRC32
0 = 16-bit CRC.
1 = 32-bit CRC.
FSE—Flag Sharing Enable
0 = Normal operation.
1 = Transmits a single shared flag between back-to-back frames if NOF3-NOF2 = 0.
Other values of NOF3-NOF2 are decremented by 1.
BIT 9—Reserved for future use
RTE—Retransmit Enable
0 = No retransmission.
1 = Retransmit enabled.
FLG—Transmit Flags/ldles between Frames and Control the RTS Pin
0 = Send ones between frames; RTS negated between frames.
1 = Send flags between frames; RTS is always asserted.
ENC—Data Encoding Format
0 = Non-return to zero (NRZ).
1 = Non-return to zero inverted (NRZI).
DIAG1, DIAG0—Diagnostic Mode
00 = Normal operation.
01 = Loopback mode.
10 = Automatic echo.
11 = Software operation.
ENR—Enable Receiver
0 = Receiver is disabled.
1 = Receiver is enabled.
ENT—Enable Transmitter
0 = Transmitter is disabled.
1 = Transmitter is enabled.
MODE1, MODE0—Channel Mode
00 = HDLC.
01 = Asynchronous (UART and DDCMP).
10 = Synchronous DDCMP and V.110.
11 = BISYNC and Promiscuous (Transparent).