Rabbit 3000 User Manual page 168

Table 12-19. Extended Register HDLC Mode (Ports E and F only)
Serial Port x Extended Register
Bit(s) Value
000
010
7:5 100
110
111
0
4
1
0
3
1
0
2
1
1:0 xx
160
Description (HDLC mode only)
NRZ data encoding for HDLC receiver and transmitter.
NRZI data encoding for HDLC receiver and transmitter.
Biphase-Level (Manchester) data encoding for HDLC receiver and transmitter.
Biphase-Space data encoding for HDLC receiver and transmitter.
Biphase-Mark data encoding for HDLC receiver and transmitter.
Normal HDLC data encoding.
Enable RZI coding (1/4th bit cell IRDA-compliant). This mode can only be used
with internal clock and NRZ data encoding.
Idle line condition is Flags.
Idle line condition is all ones.
Transmit Flag on underrun.
Transmit Abort on underrun.
These bits are ignored in HDLC mode.
(SEER) (Address = 0xCD)
(SFER) (Address = 0xDD)
Rabbit 3000 Microprocessor