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參數(shù)資料
| 型號(hào)： | UC1608 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 128COM x 240SEG Matrix LCD Controller-Driver |
| 中文描述： | 128COM x 240SEG矩陣LCD控制器驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 26/42頁(yè) |
| 文件大?。?/td> | 996K |
| 代理商： | UC1608 |
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UC1608
128x240 Matrix LCD Controller-Drivers
(Revision 0.52 Preview)
23
R
ESET
& P
OWER
M
ANAGEMENT
T
YPES OF
R
ESET
UC1608 has two different types of Reset:
Power-ON-Reset
and
System-Reset
.
Power-ON-Reset
is performed right after V
DD
is
connected to power.
Power-On-Reset
will first wait
for about ~15mS, depending on the time required
for V
DD
to stabilize, and then trigger the
System
Reset
.
System Reset
can also be activated by software
command or by connecting RST pin to ground. In
the following discussions, Reset means
System
Reset
.
R
ESET
S
TATUS
When UC1608 enters RESET sequence:
Operation mode will be “Reset”
System Status bits RS and BZ will stay as “1”
until the Reset process is completed. When
RS=1, the IC will only respond to
Read Status
command. All other commands are ignored.
All control registers are reset to default values.
Refer to Control Registers for details of their
default values.
O
PERATION
M
ODES
UC1608 has three operating modes (OM):
Reset, Normal, Sleep.
Mode
OM
Reset
00
Active
OFF
OFF
OFF
ON
Sleep Normal
10
Active
OFF
OFF
OFF
OFF
11
Host Interface
Clock
LCD Drivers
Charge Pump
Draining Circuit
Active
ON
ON
ON
OFF
Table 11:
Operating Modes
C
HANGING
O
PERATION
M
ODE
In addition to Power-ON-Reset, two commands will
initiate OM transitions:
Set Display Enable
, and
System Reset
.
When DC[2] is modified by
Set Display Enable
, OM
will be updated automatically. There is no other
action required to enter Sleep mode.
For maximum energy utilization, Sleep mode is
designed to retain charges stored in external
capacitors C
B0
, C
B1
, and C
L
. To drain these
capacitors, use Reset command to activate the on-
chip draining circuit.
Action
Mode
Sleep
Normal
OM
10
11
Set Driver Enable to “0”
Set Driver Enable to “1”
Reset command or
RST_ pin pulled “L”
Power ON reset
Reset
00
Table 12:
OM changes
Even though UC1608 consumes very little energy
in Sleep mode (typically 5uA or less), however,
since all capacitors are still charged, the leakage
through COM drivers may damage the LCD over
the long term. It is therefore recommended to use
Sleep mode only for brief Display OFF operations,
such as full-frame screen updates, and to use
RESET for extended screen OFF operations.
E
XITING
S
LEEP
M
ODE
UC1608 contains internal logic to check whether
V
LCD
and V
BIAS
are ready before releasing COM
and SEG drivers from their idle states. When
exiting Sleep or Reset Mode, COM and SEG
drivers will not be activated until UC1608 internal
voltage sources are restored to their proper values.
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