Rabbit 6000 User’s Manual
digi.com
213
Serial Port x Control Register
(SECR)
(Address = 0x00CC)
(SFCR)
(Address = 0x00DC)
Bit(s)
Value
Description
7:6
00
No operation. These bits are ignored in the asynchronous mode.
01
In HDLC mode, force receiver in flag search mode.
10
No operation.
11
In HDLC mode, transmit an abort pattern.
5:4
00
Parallel Port C is used for data (and optional clock) input.
01
Parallel Port D is used for data (and optional clock) input.
10
Parallel Port E is used for data (and optional clock) input.
11
Disable the receiver data input. Clocks from Parallel Port E.
3:2
00
Asynchronous mode with 8 bits per character.
01
Asynchronous mode with 7 bits per character. In this mode the most significant
bit of a byte is ignored for transmit, and is always zero in receive data.
10
HDLC mode with external clock. The external clocks are supplied via parallel
port pins.
11
HDLC mode with internal clock. The clock is 16× the data rate, and the DPLL is
used to recover the receive clock. If necessary, the receiver and transmitter clocks
can be output via parallel port pins.
1:0
00
The serial port interrupt is disabled.
01
The serial port uses Interrupt Priority 1.
10
The serial port uses Interrupt Priority 2.
11
The serial port uses Interrupt Priority 3.
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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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Страница 420: ...Rabbit 6000 User s Manual digi com 420 Figure 37 1 Memory Read and Write Cycles...