MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 429

• Manufacturer Part Number: MC68000
• Manufacturer: MOTOROLA [Motorola, Inc]

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