Technical information

2-26
3800 GROUP USER’S MANUAL
APPLICATION
2.3 Serial I/O
B
Baud rate generator (BRG) [Address : 1C16]
b7 b6 b5 b4 b3 b2 b1 b0
Baud rate generator
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A count value of Baud rate generator is set.
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Function
At reset
W
0
1
2
3
4
5
6
7
R
Fig. 2.3.6 Structure of Baud rate generator
Fig. 2.3.7 Structure of Interrupt edge selection register
Interrupt edge selection register (INTEDGE) [Address : 3A16]
Interrupt edge selection register
INT0 interrupt edge
selection bit
0 : Falling edge active
1 : Rising edge active
0
INT1 interrupt edge
selection bit
0 : Falling edge active
1 : Rising edge active
INT
3 interrupt edge
selection bit
0 : Falling edge active
1 : Rising edge active
Nothing is allocated for these bits. These are write disabled
bits. When these bits are read out, the values are “0.”
0
INT4 interrupt edge
selection bit
0 : Falling edge active
1 : Rising edge active
INT
5 interrupt edge
selection bit
0 : Falling edge active
1 : Rising edge active
0

0
0
0
0
0
INT2 interrupt edge
selection bit
0 : Falling edge active
1 : Rising edge active
At reset
B
Name Function
RW
0
1
2
3
4
5
6
7

b7 b6 b5 b4 b3 b2 b1 b0