H H H - Sony CXD2701Q Data Book

SONY*
CXDt160AP;'AQ
AU Command
ii9
ne
117 I16=L 116=11
Zero Kz Plus
Minus OVF XOVF
L
I-
L
+
P
-Acc
+
4P-ACC
O G
O O
L L
H
Acc+P —Ace
Acc
+ 4P—
Acc
X
X
O o o
L
H
L
0-P
-Acc
0-4P—
Acc
O O o
L
H H
Acc-P —Acc
Acc-4P—
Acc
o o
H
L L
0-R
-Ace
0+4R-Acc
o
o
O
o c
H
L
11
Acc
+
R
—
Acc
Acc
-
4
R—
Acc
X X
O
o
H H
L
R
-Acc
4R
-Acc
o
o c
o
H H H
Acc-R Acc-4R
o O
c
For the
4bit of Instructions 119 to 116
AU command
is
provided !R
iand'4R
are absolute values.
'Acc-R'
and
'Acc-4R'
are absolute
values. 'Acc-R'
and
'Acc-4R' are comparison
commands.
Multiplication
results are not stored
in
Acc,
and Acc
holds the previous value.
Acc
bit
length
is
at
34b
it.
4-2~*'£Acc
£-4
Min. resolution capability 2
P
is
at 33bit
of
multiplication results
from
the previous
command.
It
is
code expanded
to 34bii for
use.
R
stands
at
a
32bit
value as entered
in
R
register
by
transfer
commands
from
the
commands
received
up
to that,
it
is
similarly
code expanded
to 34bit
for
use.
There
are
5 Flags
for
the multiplication results of
AU
commands
to
be used
when
the following
command
is
a
conditional
jump command. However where
X
mark
is
shown on
the
above
chart,
it
is
undefined,
so
exercise care.
z
er0 Acc
"
(ton
Zero Acc
*
Plus
Acc
S
Minus Acc
<
Over Plow
Acc
21
or
Acc<-1
Only
for
comparison
commands
Flag
is
raised
for
'Acc-R'
and Acc-4R.
XOVF
output
pin
turns to active
L during the
command
in
execution
after
OVF
has
turned
to true.
When
Acc
value
is
used
for
MPY,
transfer or barrel
shifter,
it
passes through
clipper
to
be used
in
32
bit
length.
Assuming
clipper output=A,
we
have:
IF
Acc
£
1
then
A=l-2-"
else
t
>Acc £:-! then A-Acc
else
-I>Acc
then
A--1
140