Samsung RL37Lx Instrukcja Użytkownika Strona 30

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Confidential MAX8698C, Rev08
Page 30/47
DO NOT COPY. DO NOT DISTRIBUTE 12/8/2009
BATT < V
BATT_UVLO
POWER UP
(or MR/ Auto-Reboot
with 80msec
debounce timer )
PWRON=High
PWRHOLD=HIGH
PWRHOLD=HIGH
PWRON&PWRHOLD
=Low
VLDO9 >87%
P
W
R
H
O
L
D
&
P
W
R
O
N
=
L
o
w
P
W
R
O
N
&
P
W
R
H
O
L
D
=
L
o
w
SHUTDOWN:
nRESET=low
nBATT_FAULT=low
All Supplies are powered OFF
LDO1 can be enabled by Backup battery
POWER OFF:
nRESET=low
nBATT_FAULT=high
VCC_COIN & VLDO1 are enabled
All other supplies are powered OFF
POWER UP:
nRESET=low
Buck1/2/3,LDO2/3/5/6/8/9 are enabled
All other power supplies are powered OFF
Auto-Reboot:
MAX8698 is automatically rebooted with
320ms delay when MR/ = low
.
Reset Timer Start:
nRESET=low
Reset timer starts (60msec)
PWRHOLD wait timer starts (640msec) during
Auto-Reboot mode
Buck1/2/3,LDO2/3/5/6/8/9 are powered ON.
All other power supplies are powered OFF.
WaitPWRHOLD:
nRESET=high
OPERATION I
2
C CONTROL:
nRESET=high
Buck1&2 are controlled by SET1,SET2,SET3,
PWR_EN, and I
2
C.
All other power supplies are controlled by EN
logic signals or I
2
C.
PowerDown Sequence:
See Figure 5 and 6
BATT > V
BATT_UVLO
t_
RESET
= 60ms
Wait
PWRHOLD
OPERATION
I
2
C CONTROL
Manual Reset
PowerDown
Sequence
SHUTDOWN
POWER OFF
RESET Timer Start
VLDO9 < 87%
O
R
V
L
D
O
9
<
8
7
%
O
R
P
W
R
H
O
L
D
=
L
O
W
i
n
6
4
0
m
s
e
c
d
u
r
i
n
g
A
u
t
o
-
R
e
b
o
o
t
M
o
d
e
O
r
V
L
D
O
9
<
8
7
%
O
r
P
W
R
H
O
L
D
=
l
o
w
a
n
d
P
W
R
O
N
=
f
a
l
l
i
n
g
E
d
g
e
MR/ = low
POWER Down
Sequence
n
R
E
S
E
T
=
l
o
w
T_
PWRHOLD_Wait
=
640ms during
Auto-Reboot
mode
AND
PWRHOLD & PWRON =
HIGH
Figure 7. State Diagram
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