m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 194

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

3. APPENDIX
Fig. 3.3.3 Structure of Serial I/O automatic transfer data pointer
Fig. 3.3.4 Structure of Serial I/O 1 control register
180
Serial I/O 1 control register
Serial I/O automatic transfer data pointer
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
B
0
1
2
3
4
5
6
7
B
0
1
2
3
4
5
6
7
Serial I/O 1 control register (SIO1CON) [Address:19
Serial I/O automatic transfer data pointer (SIODP) [Address:18
Internal synchronous clock
selection bits
Serial I/O 1 port selection bit
(P6
S
(P6
Transfer direction selection
bit
Synchronous clock selection
bit
P6
disable bit
Note :
Indicate an address of Serial I/O automatic transfer RAM.
Nothing is allocated for these bits. These are write disabled bits.
When these bits are read out, the values are "0."
RDY1
Valid only in the Serial I/O automatic transfer mode
5
5
7
/S
,P6
)
OUT1
output selection bit
6
When an external clock is selected in the serial I/O 1 automatic transfer
mode, the S
3819 Group USER’S MANUAL
,P6
Name
P-channel output
7
)
RDY1
signal pin is used as the CS signal input pin.
Function
b2 b1b0
0 : I/O port
1 : S
0 : I/O port
1 : S
0 : LSB first
1 : MSB first
0 : External clock
1 : Internal clock
0 : CMOS output (in output mode)
1 : N-channel open-drain output
000 : f(X
001 : f(X
010 : f(X
011 : f(X
110 : f(X
111 : f(X
(in output mode)
OUT1
RDY1
IN
IN
IN
IN
IN
IN
, S
/CS 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
3.3 Control registers
CLK11
, S
16
]
CIN
CLK12
MITSUBISHI MICROCOMPUTER
CIN
CIN
CIN
)/8
CIN
CIN
)/16
)/32
)/64
signal pins
)/128
)/256
( Note)
16
]
3819 Group
At reset
At reset
?
?
?
?
?
0
0
0
0
0
0
0
0
0
0
0
R W
R W