m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 102

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

2. APPLICATION
Fig. 2.3.5 Structure of Serial I/O automatic transfer interval register
Fig. 2.3.6 Structure of Serial I/O 2 control register
88
Serial I/O 2 control register
Serial I/O automatic transfer interval register
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
B
B
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Serial I/O 2 control register (SIO2CON) [Address:1D
Serial I/O automatic transfer interval register (SIOAI) [Address:1C
Internal synchronous clock
selection bits
Serial I/O 2 port selection bit
(P5
S
(P5
Transfer direction selection bit 0 : LSB first
Synchronous clock selection
bit
P5
disable bit
Ti = (n + 2)
Nothing is allocated for these bits. These are write disabled bits.
When these bits are read out, the values are "0."
RDY2
Ti = a length of transfer interval
Tc = a length of a bit of transfer clock
n = a setting value
1
1
3
/S
,P5
)
OUT2
output selection bit
2
)
3819 Group USER’S MANUAL
Name
P-channel output
Tc
Function
b2 b1b0
000 : f(X
001 : f(X
010 : f(X
011 : f(X
110 : f(X
111 : f(X
0 : I/O port
1 : S
0 : I/O port
1 : S
1 : MSB first
0 : External clock
1 : Internal clock
0 : CMOS output (in output mode)
1 : N-channel open-drain output
(in output mode)
OUT2
RDY2
IN
IN
IN
IN
IN
IN
, S
signal pin
Function
)/8 or f(X
)/16 or f(X
)/32 or f(X
)/64 or f(X
)/128 or f(X
)/256 or f(X
CLK2
signal pins
16
CIN
]
MITSUBISHI MICROCOMPUTER
CIN
CIN
CIN
CIN
CIN
)/8
)/16
)/32
)/64
)/128
)/256
2.3 Serial I/O
16
3819 Group
]
At reset
At reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R W
R W