27
8Bit Single Chip Microcontroller
DMC73C168
BAU2n
:
SIO2 transmission speed select bits.
This read/write bits determine SIO2 transmission speed.
BAU21 BAU20
SCLK FREQ. (Fosc=4.5KHz)
0
0
1
1
0
1
0
1
Fosc/8
=
=
=
=
563 KHz
281 KHz
141 KHz
70 KHz
Fosc/16
Fosc/32
Fosc/64
SIO2EF
:
Transmission error flag bit
This read bit shows overrun error was occured or not
0 = Overrun error is not occured
1 = Overrun error is occured
SIO2EC :
SCLK2E :
Transmission error flag clear bit
This write bit determines transmission error flag is cleared or not.
0 = Transmission error flag is not affected
1 = Transmission error flag is cleared
SIO2 clock enable bit
This read/write bit determines PORT E5 bit is SIO2 clock output pin or not
0 = PORT E5 is normal I/O port
1 = PORT E5 is assigned SIO2 clock output pin when "CKSRC2" is set.
(Then, PORT E5 direction should be output)
SO2ENA :
Serial output enable bit
This read/write bit determines PORT E3 is SO2 pin or not
0 = PORT E3 is normal I/O port
1 = PORT E3 is assigned SO2 pin (Then, PORT E3 direction should be output state)
PF NAME : SIO2BUF
R/W
: SERIAL I/O 2 DATA REGISTER
BIT 6 BIT 5 BIT 4 BIT 3
BIT 7
BIT 2
BIT 1
BIT 0
P30
READ
SIO2 RECEIVING DATA
>011E WRITE
RESET VALUE
SIO2 TRANSMITTING DATA
X
X
X
X
X
X
X
X
X : INDETERMINATOR
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