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Rabbit 6000 User’s Manual
digi.com
215
Serial Port x Extended Register
(SEER)
(Address = 0x00CD)
(SFER)
(Address = 0x00DD)
(HDLC Mode Only)
Bit(s)
Value
Description
7:5
000
NRZ data encoding for HDLC receiver and transmitter.
010
NRZI data encoding for HDLC receiver and transmitter.
100
Biphase-level (Manchester) data encoding for HDLC receiver and transmitter.
110
Biphase-space data encoding for HDLC receiver and transmitter.
111
Biphase-mark data encoding for HDLC receiver and transmitter.
4
0
Normal HDLC data encoding.
1
Enable RZI coding (¼ bit cell IrDA-compliant). This mode can only be used
with an internal clock and NRZ data encoding.
3
0
Idle line condition is flags.
1
Idle line condition is all ones.
2
0
Transmit flag on underrun.
1
Transmit abort on underrun.
1
0
Separate HDLC external receive and transmit clocks.
1
Combined HDLC external and transmit clock, from transmit clock pin.
0
This bit is ignored in HDLC mode.
Serial Port x Divider Low Register
(SEDLR)
(Address = 0x00CE)
(SFDLR)
(Address = 0x00DE)
Bit(s)
Value
Description
7:0
Eight LSBs of the divider that generates the serial clock for this channel. This
divider is not used unless the MSB of the corresponding SxDHR is set to one.
Serial Port x Divider High Register
(SEDHR)
(Address = 0x00CF)
(SFDHR)
(Address = 0x00DF)
Bit(s)
Value
Description
7
0
Disable the serial port divider and use the output of Timer A to clock the serial
port.
1
Enable the serial port divider, and use its output to clock the serial port. The
serial port divider counts modulo
n
+ 1 and is clocked by the peripheral clock.
6:0
Seven MSBs of the divider that generates the serial clock for this channel.
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Страница 234: ...Rabbit 6000 User s Manual digi com 234 Figure 22 3 Sample Slow A D Converter Circuit...
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