176
Chapter 4
Clock Generator
Preliminary User’s Manual U17566EE1V2UM00
In th
e ta
b
le f
o
llo
w
ing
ter
m
s
ar
e
us
ed:
Wa
tc
h
Tim
e
r
L
CD-C/D
WT
CLK
L
CDCL
K
W
T
SOS/WT
SEL0=
00
B
R
O
SCK
R
OSCK
R
O
SC
K
RO
S
C
K
(of
f
b
)
RO
S
C
K
RO
S
C
K
(o
ff
b
)
RO
S
C
K
RO
S
C
K
(o
ff
b
)
RO
S
C
K
W
T
SOS/WT
SEL0=
10
B
n.a
.
SOCLK
S
OCLK
SOC
L
K
(of
f
b
)
SOCLK
S
OCLK
SOCL
K
S
OCLK
SO
CL
K
W
T
SOS/WT
SEL0=
x
1
B
MOC
L
K
M
O
C
LK
of
f
M
OC
L
K
MO
CLK
(off
c
)
MO
C
L
K
MOCL
K
(off
c
)
MO
C
L
K
P
o
rt
FOUTCL
K
F
O
S
OS/F
O
C
KS1
/0
=
x
0
0
B
o
ff
M
OCL
K
MO
CL
K
M
O
C
L
K
L
CD-C/D
M
OCL
K
M
O
CL
K
F
O
SOS/F
O
CKS1
/0=
x
01
B
n.a
.
SSCCL
K
SSCCL
K
SSCCL
K
SSCCL
K
SSCCL
K
F
O
SOS/F
O
CKS1
/0=
x
10
B
PLLC
L
K
PL
LC
LK
PLLC
L
K
PLLC
L
K
PLL
C
L
K
F
O
SOS/F
O
CKS1
/0=
011
B
R
O
CL
K
R
O
C
L
K
R
O
CL
K
R
OCL
K
R
O
CL
K
F
O
SOS/F
O
CKS1
/0=
111
B
SOCLK
S
OCLK
SOCLK
S
OCLK
SOCLK
a)
Af
ter re
se
t re
lea
s
e
the
s
e
cl
oc
ks
are
su
ppl
ied
w
ith
th
e ri
ng R
O
C
L
K.
Whe
n
th
e m
a
in
o
s
c
ill
ato
r is
s
tabl
e,
thes
e
clo
c
k
s
are
auto
m
a
tic
al
ly
ch
ang
ed
to M
O
C
L
K.
b)
R
O
C
L
K
(SOC
L
K
) rem
a
in
s
cl
oc
k s
o
u
rce
, bu
t rin
g
o
s
c
ill
ato
r (s
ub
osc
ill
a
tor) m
a
y
be
st
opp
ed
in
the
res
pec
tiv
e
p
o
w
e
r sa
ve
mo
de
by
WC
C.ROSTP
=
1
(WCC.SOST
P
=
1
).
c)
M
O
SC
LK re
ma
ins
c
loc
k
so
urc
e
, b
u
t m
a
in
o
s
c
ill
ato
r m
a
y
be
sto
ppe
d i
n
th
e re
sp
ect
iv
e
po
w
e
r s
a
v
e
m
o
d
e
b
y
PSM
.O
SC
D
IS
=
1.
s
top
:
O
s
c
ill
a
tor
sto
ppe
d
M
O
C
LK:
M
a
in
os
ci
lla
tor c
lo
c
k
on
:
O
sc
illa
to
r o
p
e
ra
ti
ng
R
O
C
L
K
:
R
ing
o
sci
lla
tor
c
lo
c
k
s
tb
y
:
P
LL/
SSC
G i
n
s
tan
db
y,
n
o
c
lo
c
k o
u
tp
ut
SO
C
L
K
:
Sub
os
ci
lla
tor
clo
c
k
pl
le
n
/sc
en
:
P
L
L
/S
S
C
G
ge
nr
at
e
s
cl
o
c
k o
u
tp
ut
S
B
C
L
K
:
S
u
b c
lo
c
k
– PCC
.SO
S
C
P
=
0:
R
O
CLK
– PCC
.SO
S
C
P
=
1:
SOCLK
o
ff:
C
loc
k
in
ac
tiv
e
PL
LC
LK
:
P
LL
ou
tput
cl
oc
k
n
.a.
not
app
licab
le (c
on
trol
bit
s
a
re d
e
ter
-
m
ined
b
y
h
a
rd
w
a
re)
SS
C
G
C
L
K
:
SSC
G
out
put
cl
oc
k
T
a
b
le 4-
29
S
tat
u
s
o
f o
scil
lat
o
rs a
n
d
C
lo
c
k
G
e
n
e
ra
to
r o
u
tp
u
t c
lo
c
ks (
3
/3
)
Ma
cr
o
Cloc
k
si
gnal
Co
nditi
on
Rese
t
Rese
t
re
lease
Norma
l
IDLE
IDLE
re
lease
STOP
STOP
re
lease
WAT
CH
WAT
CH
re
lease
Sub-WA
TCH
Sub-WA
TCH
re
lease
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