PF833-01
SED1234/35 Series
SED1234/35 Series
Dot Matrix LCD Controller Driver
q
12 chara x 4 line (5 x 7 dot)
q
Built-in Character Generator ROM and RAM
q
Built-in Power Supply Circuit for LCD
s
OVERVIEW
The SED1234, 1235 Series is a dot matrix LCD controller driver for character display, and can display a maximum
of 48 characters, 4 user-defined characters, and a maximum of 48 symbols by means of 4-bit, 8-bit or serial data
sent from a microcomputer.
A built-in character generator ROM is prepared for 256 character types, and each character font consists of 5 x 7
dots. A user-defined character RAM for four characters of 5 x 7 dots are incorporated, and a symbol register is also
incorporated. With these, it is possible to apply this Series to display with a high degree of freedom. This Series
can operate handy units with a minimum power consumption by means of its low power consumption and sleep
mode.
SED1234, and 1235 depending on the duty of use and the number of display columns.
s
FEATURES
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Built-in display RAM
48 characters + 4 user-defined characters + 48 symbols
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CG ROM (for up to 256 characters), CG RAM (4 characters), and symbol register (48 symbols)
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Number of display columns x number of lines
(12 columns + 2 segment for signal) x 4 lines + 48 symbols: SED1234
(12 columns + 2 segment for signal) x 2 lines + 48 symbols: SED1235
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CR oscillation circuit (on-chip C and R)
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High-speed MPU interface
Interfacing with both 68 series and 80 series MPU
Interfacing in 4 bits/8 bits
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Serial interface
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Character font
5 x 7 dots
1/16 (SED1235)
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Duty ratio
1/30 (SED1234)
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Simple command setting
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Built-in liquid crystal driving power circuit
Power boosting circuit, power regulating circuit, voltage follower x 4
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Built-in electronic volume function
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Low power consumption
100µA Max.
(In normal operation mode: Including the operating current of the built-in power supply)
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Power supply
V
DD
- V
SS
(logic section):
–2.4 V to –3.6 V
V
DD
- V
5
(liquid crystal drive section): –5.0 V to –8.0 V
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Wide operating temperature range
Ta = –30 to 85°C
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CMOS process
(Pad Pitch)
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COB assemble
126µm Min.
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Delivery form: Chip SED123VD
A
, SED123VD
C
*
*
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This IC is not designed with a protection against radioactive rays.
1
SED1234/35 Series
• ABSOLUTE MAXIMUM RATINGS
Item
Power supply voltage (1)
Power supply voltage (2)
Power supply voltage (3)
Input voltage
Output voltage
Operating temperature
Storage temperature
TCP
Bare chip
Symbol
V
SS
V
5
V
1
, V
2
, V
3
, V
4
V
IN
V
O
T
opr
T
str
Standard value
–6.0 to +0.3
–16.0 to +0.3
V
5
to +0.3
V
SS
–0.3 to +0.3
V
SS
–0.3 to +0.3
–30 to +85
–55 to +100
–65 to +125
Unit
V
V
V
V
V
°C
°C
(V
CC
) V
DD
(GND) V
SS
V
DD
V
5
Notes: 1. All the voltage values are based on V
DD
= 0 V.
>
>
>
>
>
>
2. For voltages of V
1
, V
2
, V
3
and V
4
, keep the condition of V
DD
= V
1
= V
2
= V
3
= V
4
= V
5
and V
DD
= V
SS
>
>
= V
5
= V
OUT
at all times.
3. If the LSI is used exceeding the absolute maximum ratings, it may lead to permanent destruction.
In ordinary operation, it is desirable to use the LSI in the condition of electrical characteristics. If the LSI
is used out of this condition, it may cause a malfunction of the LSI and have a bad effect on the reliability
of the LSI.
4
SED1234/35 Series
• DC CHARACTERISTICS
(V
DD
= 0 V, V
SS
= –3.6 V to –2.4 V, Ta = –30 to 85°C unless otherwise specified.)
Item
Power
Recommended
supply
operation
voltage (1)
Operable
Power
Recommended
supply
operation
voltage (2)
Operable
Operable
Operable
High-level input voltage
Low-level input voltage
Input leakage current
LC driver ON resistance
Static current consumption
Dynamic current
I
DD
consumption
Symbol
V
SS
–5.5
–8.0
V
5
V
1
, V
2
V
3
, V
4
V
IHC
V
ILC
I
LI
R
ON
–11.0
0.6×V
5
V
DD
0.2×V
SS
V
SS
–1.0
20
0.1
–4.5
V
DD
0.4×V
5
V
DD
0.8×V
SS
1.0
40
5.0
100
20
5
500
130
8.0
V
V
V
V
µA
KΩ
µA
µA
µA
µA
µA
Hz
pF
µs
µs
ns
–2.4
V
V
V
V
V
*12
*12
*2
V
1
, V
2
V
3
, V
4
*3
*3
*3
COM,SEG
*4
V
DD
V
DD
*5
V
DD
*6
V
DD
V
DD
*7
*11
*3
*8
*9
*9
*10
V
OUT
–3.0
–2.4
–5.0
V
*1
V
5
Condition
min
–3.6
typ
–3.0
max
–2.4
Unit
V
Applicable pin
V
SS
V
IN
= V
DD
or V
SS
Ta=25°C
V
5
=–7.0V
∆V=0.1V
Frame frequency
Input pin capacity
Reset time
Reset pulse width
Reset start time
Input voltage
Booster output voltage
Voltage follower
operating voltage
Reference voltage
(standard)
Reference voltage
(option)
I
DDQ
Display State V
5
= –7 V without load
Standby state Oscillation ON,
Power OFF
Sleep state
Oscillation OFF,
Power OFF
Access state f
cyc
=200KHz
f
FR
Ta=25°C
V
SS
=–3.0V
C
IN
Ta=25°C
f=1MHz
t
R
t
RW
t
RES
V
SS
V
OUT
V
5
V
REG
Ta = 25°C
70
100
5.0
1.0
10
50
–3.6
–7.2
–10.8
–11.0
–3.5
–2.4
–3.1
–2.1
Built-in power supply
Double boosting state
Triple boosting state
–4.5
–2.7
–1.8
V
REG(VS1)
Ta = 25°C
*1: A wide operating voltage range is guaranteed but an
abrupt voltage variation in the access status of the MPU
is not guaranteed.
*2: The operating voltage range is applicable to the case
where an external power supply is used.
*3: D0 to D5, D6 (SCL), D7 (SI), A0, RES, CS WR (E), P/
S, IF
*4: This is a resistance value when a voltage of 0.1 V is
applied between output pin SEGn, SEGSn, COMn or
COMSn, and each power pin (V1, V2, V3 or V4). It is
specified in the range of operating voltage (2).
R
ON
= 0.1 V /
∆I
(
∆I
: C u r r e n t f l o w i n g w h e n 0 . 1 V i s
applied between the power and output)
*5: Character "
" display. This is applicable
to the case where no access is made from the MPU and the
built-in power circuit and oscillating circuit are in operation.
5
Embedded System
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