ST7565S ETC-unknow, ST7565S Datasheet - Page 31

• Manufacturer Part Number: ST7565S
• Description: 65 X 132 Dot Matrix Lcd Controller/driver
• Manufacturer: ETC-unknow

ST7565S
The Power Supply Circuits
The power supply circuits are low-power consumption power
supply circuits that generate the voltage levels required for
the LCD drivers. They are Booster circuits, voltage regulator
circuits, and voltage follower circuits. They are only enabled
in master operation. The power supply circuits can turn the
Booster circuits, the voltage regulator circuits, and the
* The “step-up system terminals” refer CAP1+, CAP1–, CAP2+, CAP2–, and CAP3–.
* While other combinations, not shown above, are also possible, these combinations are not recommended
The Step-up Voltage Circuits
Using the step-up voltage circuits equipped within the
ST7565S chips it is possible to product a 2X,3X,4X,5X or 6X
step-up of the V
6X step-up: Connect capacitor C1 between CAP1+ and
5X step-up: Connect capacitor C1 between CAP1+ and
Ver 0.3c
because they have no practical use.
Only the internal power supply is used
Only the voltage regulator circuit and the
Only the V/F circuit is used
Only the external power supply is used
voltage follower circuit are used
CAP1–, between CAP2+ and CAP2–, between
CAP1+ and CAP3–, between CAP2+ and
CAP4–,between CAP1+ and CAP5–, and
between V
level in the negative direction at the
t
between V
CAP1–, between CAP2+ and CAP2–, between
CAP1+ and CAP3–, between CAP2+ and
CAP4–,and between V
produce a voltage level in the negative direction
at the
level between V
erminal that is 6 times the voltage level
DD
Use Settings
Table 7
VOUT t
– V
D2
D1
D0
bit
SS2
SS2
DD
erminal that is 5 times the voltage
and V
voltage levels.
and
DD
The Control Details of Each Bit of the Power Control Set Command
Booster circuit control bit
Voltage regulator circuit control bit (V/R circuit)
Voltage follower circuit control bit (V/F circuit)
VOU
and V
SS
2.
T, to produce a voltage
SS2
SS
and
2.
VOU
D2
1
0
0
0
T, to
VOUT
Reference Combinations
D1 D0
1
1
0
0
function
Table 8
1
1
1
0
31/72
Voltage
booster
ON
OFF
OFF
OFF
voltage follower circuits ON or OFF independently through
the use of the Power Control Set command. Consequently, it
is possible to make an external power supply and the internal
power supply function somewhat in parallel. Table 7 shows
the Power Control Set Command 3-bit data control function,
and
4X step-up: Connect capacitor C1 between CAP1+ and
3X step-up: Connect capacitor C1 between CAP1+ and CAP1–, between
2X step-up: Connect capacitor C1 between CAP1+ and
The step-up voltage relationships are shown in Figure 7.
Voltage
regulator
Table
ON
ON
OFF
OFF
CAP1–, between CAP2+ and CAP2–, between
CAP1+ and CAP3–, and between V
VOU
direction at the
voltage level between V
CAP2+ and CAP2– and between V
between CAP3– and
level in the negative direction at the
terminal that is 3 times the voltage difference
between V
CAP1–, and between V
CAP2+ open, and short between CAP2–,
CAP3– and
negative direction at the
twice the voltage between
T, to produce a voltage level in the negative
8
Voltage
follower
shows
DD
ON
ON
ON
OFF
VOUT
and V
“1”
ON
ON
ON
VOUT
Status
to produce a voltage in the
SS
V
reference
terminal that is 4 times the
OUT
VOUT
External
voltage
input
V5, V
V
2.
OFF
OFF
OFF
1
SS2
DD
“0”
V
VOUT
, V
to V
SS2
VDD
to produce voltages
and V
and V
SS2
SS2
5
terminal that Is
and V
SS
OUT
combinations.
Step-up
voltage
2.
SS2
2002/07/22
SS2
Open
Open
Used
Open
VOUT
SS
, leave
and V
2.
and
OUT
, and short