uc1682 ETC-unknow, uc1682 Datasheet - Page 47

• Manufacturer Part Number: uc1682
• Description: 80 X 104rgb C-stn Lcd Controller-driver W/ 32-shade Per Dot, 12-bit Per Rgb
• Manufacturer: ETC-unknow

R
T
UC1682 has two different types of Reset:
Power-ON-Reset is performed right after V
connected to power. Power-On-Reset will first wait
for about 5~10mS, depending on the time required
for V
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
When UC1682 enters RESET sequence:
x
x
x
O
UC1682 has three operating modes (OM):
Revision 0.6
Reset, Normal, Sleep.
YPES OF
ESET
PERATION
Power-ON-Reset and System-Reset .
ESET
Draining Circuit
Host Interface
Charge Pump
LCD Drivers
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.
DD
S
Mode
Clock
to stabilize, and then trigger the System
TATUS
OM
& P
R
ESET
M
Table 4: Operating Modes
ODES
OWER
Reset
Active
OFF
OFF
OFF
M
ON
00
ANAGEMENT
Sleep Normal
Active
OFF
OFF
OFF
OFF
10
Active
OFF
ON
ON
ON
11
DD
is
C
In addition to Power-ON-Reset, two commands will
initiate OM transitions:
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
capacitors, use Reset command to activate the on-
chip draining circuit.
Even though UC1682 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
UC1682 contains internal logic to check whether
V
and SEG drivers from their idle states. When
exiting Sleep or Reset mode, COM and SEG
drivers will not be activated until UC1682 internal
voltage sources are restored to their proper values.
XITING
LCD
HANGING
Set Display Enable , and System Reset .
Set Driver Enable to “0”
Set Driver Enable to “1”
and V
RST_ pin pulled “L”
Reset command or
Power ON Reset
S
LEEP
O
BIAS
Action
PERATION
B0
, C
M
Table 5: OM changes
are ready before releasing COM
ODE
B1
, and C
80x104RGB CSTN Controller-Driver
M
ODE
L
. To drain these
Normal
Mode
Reset
Sleep
UC1682
OM
10
11
00
45