336
B.2
I/O Registers (2)
MTCR—Multitone control register
H'90
Multitone generator
Register
name
Address to which the
register is mapped
Name of
on-chip
supporting
module
Register
acronym
Bit
numbers
Initial bit
values
Names of the
bits. Dashes
(—) indicate
reserved bits.
Full name
of bit
Descriptions
of bit settings
Read only
Write only
Read and write
R
W
R/W
Possible types of access
Bit
Initial value
Read/Write
7
DA0E
0
R/W
6
MTEN
0
R/W
5
DIR
0
R/W
3
FR1
0
—
0
FT0
0
R/W
2
FR0
0
R/W
1
FT1
0
R/W
4
—
1
—
Fine-tuning counter clock source select
FT0
0
1
0
1
Clock Division Ratio
1t
OSC
(counter clock = f
OSC
)
2t
OSC
(counter clock = f
OSC
/2)
4t
OSC
(counter clock = f
OSC
/4)
8t
OSC
(counter clock = f
OSC
/8)
FT1
0
0
1
1
Frame counter clock source select
FR0
0
1
0
1
Clock Division Ratio
1t
OSC
(counter clock = f
OSC
)
2t
OSC
(counter clock = f
OSC
/2)
4t
OSC
(counter clock = f
OSC
/4)
8t
OSC
(counter clock = f
OSC
/8)
FR1
0
0
1
1