mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 255

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC912DG128 — Rev 3.0
MOTOROLA
LOOPS RSRC
0
1
1
1
1
1
1
x
0
0
0
1
1
1
DDSI(3)
0
1
1
0
1
1
x
M — Mode (select character format)
WAKE — Wake-up by Address Mark/Idle
ILT — Idle Line Type
PE — Parity Enable
Freescale Semiconductor, Inc.
Determines which of two types of idle line detection will be used by
the SCI receiver.
In the short mode, the SCI circuitry begins counting ones in the search
for the idle line condition immediately after the start bit. This means
that the stop bit and any bits that were ones before the stop bit could
be counted in that string of ones, resulting in earlier recognition of an
idle line.
In the long mode, the SCI circuitry does not begin counting ones in the
search for the idle line condition until a stop bit is received. Therefore,
the last byte’s stop bit and preceding “1” bits do not affect how quickly
an idle line condition can be detected.
WOMS
For More Information On This Product,
0/1
0 = One start, eight data, one stop bit
1 = One start, eight data, ninth data, one stop bit
0 = Wake up by IDLE line recognition
1 = Wake up by address mark (last data bit set)
0 = Short idle line mode is enabled.
1 = Long idle line mode is detected.
0 = Parity is disabled.
1 = Parity is enabled.
Table 14-2. Loop Mode Functions
x
1
1
x
0
1
LOOP mode without TXD output(TXD = High Impedance)
LOOP mode with TXD output (CMOS)
LOOP mode with TXD output (open-drain)
Single wire mode without TXD output
Single wire mode with TXD output
Single wire mode for the receiving and transmitting(open-drain)
(the pin is used as receiver input only, TXD = High Impedance)
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(the output is also fed back to receiver input, CMOS)
Multiple Serial Interface
Function of Port S Bit 1/3
Normal Operations
Serial Communication Interface (SCI)
Multiple Serial Interface
Technical Data
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