
116
MITSUBISHI MICROCOMPUTERS
M37207MF-XXXSP/FP, M37207M8-XXXSP
M37207EFSP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
and ON-SCREEN DISPLAY CONTROLLER
Serial I/O Control Register
Port Control Register
Address 0206
16
Address 0207
16
b7 b6 b5 b4 b3 b2 b1 b0
Port control register (P7D) [Address 0206
16
]
B
Name
Functions
After reset
R W
Port Control Register
0, 1 Port P7 data input bits
(P7D0, P7D1)
When only OP1 = “0” and
OP0 = ”1,” input data is
valid. (See note)
Indeterminate
2
D-A/AD3 function selection
bit (P7D2)
0
R W
R W
0
Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are indeterminate.
R —
4
P4
0
/X
CIN
, P4
1
/X
COUT
function selection bit
(P7D4)
0 : P4
0
, P4
1
1 : X
CIN
, X
COUT
0
R W
Note:
OP is the CRT clock selection register.
0: AD3
1: D-A
3,
5 to 7
b7b6 b5b4b3 b2b1b0
Serial I/O control register (SIC) [Address 0207
16
]
B
0
Name
Functions
After reset
R W
0
Serial I/O Control Register
Input signal to sift
register selection bit
(SIC0)
CSIO b0
0 0: Input signal from S
IN1
0 1: Input signal from S
OUT1
(See note 1)
1 0: Input signal from S
IN2
1 1: Input signal from S
OUT2
(See note 1)
1
Serial I/O pin switch
bit (CSIO)
I
2
C-BUS connection
ports switch bit
(SIC2)
0:
S
OUT1
,
S
CLK1
,
S
IN1
,
S
RDY1
1:
S
OUT2
,
S
CLK2
,
S
IN2
,
S
RDY2
0:
SDA2, SCL2, SDA1, SCL1
1:
SDA3, SCL3
0
R W
R W
Notes 1:
When inputting data from the S
out
pin, set “FF
16
” to the serial
I/O register.
2:
When using ports P4
4
–P4
7
as serial I/O pins, set bit 1 of the
serial I/O control register to “0.”
3, 7 Ports P4
7
function
selection bits
(SM3, SM7)
(See note 2)
P4
7
/S
RDY1
/PWM8
P4
7
S
RDY1
PWM8
0
R W
4, 5 Ports P4
4
, P4
5
function selection bits
(SM4, SM6)
(See note 2)
6
Ports P4
6
function
selection bits
(SIC6)
(See note 2)
b7
0
1
b3
0
1
P4
4
/S
OUT1
/
SDA1
P4
4
S
OUT1
SDA1
P4
6
/S
IN1
/PWM9
0
R W
P4
5
/S
CLK1
/
SCL1
P4
5
S
CLK1
SCL1
b5
0
1
b4
0
1
P4
6
PWM9
0
R W
b6
0
1
2
0
R W