89
2. APPLICAT ION
MITSUBISHI MICROCOMPUTER
3819 Group
2.3 Serial I/O
3819 Group USER’S MANUAL
Fig. 2.3.7 Structure of Serial I/O 3 control register
Fig. 2.3.8 Structure of Interrupt request register 1
Interrupt request register 1
b7 b6 b5 b4 b3 b2 b1 b0
B
0
Function
At reset
R W
0
1
2
3
0
0
0
Interrupt request reigster 1 (IREQ1) [Address:3C
16
]
Name
INT
0
interrupt request bit
INT
1
/ZCR interrupt request bit
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
Serial I/O 1 interrupt request
bit
Serial I/O automatic transfer
interrupt request bit
G
G
6
6
6
6
4
5
6
7
0
0
0
0
Serial I/O 2 interrupt request
bit
Serial I/O 3 interrupt request
bit
Timer 1 interrupt request bit
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
Timer 2 interrupt request bit
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
6
6
6
6
6
"0" is set by software, but not "1."
INT
2
interrupt request bit
Remote control/counter
overflow interrupt request bit
G
G
Serial I/O 3 control register
b7 b6 b5 b4 b3 b2 b1 b0
B
0
Function
R W
1
2
3
4
5
6
0
0
0
0
0
0
0
Serial I/O 3 control register (SIO3CON) [Address:1E
16
]
Name
Internal synchronous clock
selection bits
Synchronous clock selection
bit
P5
5
/S
OUT3
P-channel output
disable bit
000 : f(X
IN
)/8 or f(X
CIN
)/8
001 : f(X
IN
)/16 or f(X
CIN
)/16
010 : f(X
IN
)/32 or f(X
CIN
)/32
011 : f(X
IN
)/64 or f(X
CIN
)/64
110 : f(X
IN
)/128 or f(X
CIN
)/128
111 : f(X
IN
)/256 or f(X
CIN
)/256
0 : I/O port
1 : S
OUT3
, S
CLK3
signal pins
0 : External clock
1 : Internal clock
0 : CMOS output (in output mode)
1 : N-channel open-drain output
(in output mode)
b2 b1b0
Serial I/O 3 port selection bit
(P5
5
,P5
6
)
S
RDY3
output selection bit
(P5
7
)
Transfer direction selection
bit
0 : LSB first
1 : MSB first
0 : I/O port
1 : S
RDY3
signal pin
7
0
At reset