Features: ` Built-in display data RAM: 36 characters + 4 userdefined characters + 120 symbols
` CGROM (256 characters), CGRAM (4 characters) and symbol register (120 symbols)
` Number of displaying digits and lines
<Normal mode>
(12 digits + 4 segments for signaling) * 3 lines
+ 120 symbols + 10 static symbols
<Standby mode>
10 static symbols
` On-chip CR oscillation circuit (C and R on chip)
` External clock input available
` High-speed MPU interface
Compatible with both 68- and 80-series MPUs
4- and 8-bit interface available
` Serial interface available
` Character font: 5 * 8 dots
` Duty ratio: 1/18 or 1/26
` Simple command setting
` Built-in liquid crystal drive power circuit: Power boosting and voltage regulating circuits
` Built-in electronic volume function
` Ultra-low power demand
30A: During normal operation
10A: In standby mode with static icon
5A : In sleep mode without display
` Power
VDD VSS: 1.8 V to 3.6 V (1/4 bias)
2.7 V to 3.6 V (1/5 bias)
VDD V5: 3.0 V to 6.0 V
` Wide operating temperature range: Ta = 30 to 85°C
` CMOS process
` Package to be shipped
Chip (gold bump model): SED1225D*B
TCP: SED1225T**
` This IC is not designed to resist radiation or intense light noise.Specifications
| Rating |
Symbol |
Value |
Unit |
| Power supply voltage (1) |
VSS |
6.0 to +0.3 |
V |
| Power supply voltage (2) |
V5 |
7.0 to +0.3 |
V |
| Power supply voltage (3) |
V1, V2, V3, V4 |
V5 to +0.3 |
V |
| Input voltage |
VIN |
VSS0.3 to +0.3 |
V |
| Output voltage |
VO |
VSS0.3 to +0.3 |
V |
| Operating temperature |
Topr |
30 to +85 |
°C |
| Storage temperature |
TCP |
Tstr |
55 to +100 |
°C |
| Bare chip |
65 to +125 |
Notes
1. All voltages refer to VDD as 0 V.
2. For voltages V1, V2, V3 and V4, be sure to keep the conditions of "VDD V1 V2 V3 V4" and "VDD VSS V5".
3. If the LSI is used outside the absolute maximum ratings, it may permanently break. Use under the electrical characteristics conditions is recommended for normal operation, otherwise, the LSI may malfunction, isadvantageously affecting itsreliability.
DescriptionThe dot-matrix LCD controller driver SED1225 is designed to display characters and capable of displaying up to 36 characters, 4 user-defined characters and 120 symbols using 4- or 8-bit or serial data sent from the microcomputer.
The SED1225 built-in character generator ROM is equipped with up to 256 types of character fonts, which consist of 5 × 8 dots respectively. The user-defined character RAM for 4 characters of 5 × 8 dots is also built in, enabling display of high degree of freedom through the symbol register. Thanks to its ultra-low power consumption, sleep and standby modes, it can operate handy equipment with the minimum power demand.
SED1225 Data Sheet
