Table of Contents
Contents
SED1520
1.0 Overview
.................................................................................................................................................. 7
1.1 Description .................................................................................................................................... 7
1.2 Features ........................................................................................................................................ 7
1.2.1 SED1520 family specifications ....................................................................................... 7
1.3 Block Diagram ............................................................................................................................... 8
1.4 Package ........................................................................................................................................ 9
1.4.1 Pin Configuration Table .................................................................................................. 9
2.0 Pin Description
...................................................................................................................................... 13
2.1 Power Signals ............................................................................................................................. 13
2.2 System Bus Interface Signals ..................................................................................................... 13
2.3 LCD Drive Circuit Signals ............................................................................................................ 13
3.0 Description of Circuit Blocks
............................................................................................................... 17
3.1 MPU Interface ............................................................................................................................. 17
3.1.1 Selection of Interface Type ........................................................................................... 17
3.1.2 Identification of Data Bus Signals ................................................................................. 17
3.1.3 Access to Display Data RAM and Internal Register ..................................................... 17
3.2 Busy Flag .................................................................................................................................... 17
3.3 Display Start Line Register .......................................................................................................... 17
3.4 Column Address Counter ............................................................................................................ 18
3.5 Page Register .............................................................................................................................. 18
3.6 Display Data RAM ....................................................................................................................... 19
3.7 Common Timing Generator ......................................................................................................... 19
3.8 Display Data Latch Circuit ........................................................................................................... 19
3.9 LCD Driver Circuit ....................................................................................................................... 19
3.10 Display Timing Generator .......................................................................................................... 19
3.11 Oscillation Circuit ....................................................................................................................... 19
3.12 Reset Circuit .............................................................................................................................. 22
4.0 Commands
............................................................................................................................................. 27
4.1 Display ON/OFF .......................................................................................................................... 28
4.2 Display Start Line ........................................................................................................................ 28
4.3 Set Page Address ....................................................................................................................... 28
4.4 Column Address .......................................................................................................................... 28
4.5 Read Status ................................................................................................................................. 28
4.6 Write Display Data ....................................................................................................................... 29
4.7 Read Display Data ...................................................................................................................... 29
4.8 Select ADC .................................................................................................................................. 29
4.9 Static Drive ON/OFF ................................................................................................................... 29
4.10 Select Duty ................................................................................................................................ 29
4.11 Read Modify Write ..................................................................................................................... 29
4.12 End ............................................................................................................................................ 30
4.13 Reset ......................................................................................................................................... 30
4.14 Save Power (Combined Command) .......................................................................................... 30
(continued)
S-MOS SYSTEMS, INC.
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SED1520
Table of Contents
5.0 Electrical Characteristics
..................................................................................................................... 35
5.1 Absolute Maximum Ratings ......................................................................................................... 35
5.2 DC Characteristics ...................................................................................................................... 36
5.3 Timing Characteristics ................................................................................................................. 38
5.3.1 System Bus Read/Write I (80 family MPU)................................................................... 38
5.3.2 System Bus Read/Write II (68 family MPU).................................................................. 39
5.3.3 Display Control Timing ................................................................................................. 40
6.0 MPU Interface (Reference)
................................................................................................................... 43
7.0 LCD Driver Interconnections
............................................................................................................... 47
8.0 Typical Connections with LCD Panel
.................................................................................................. 51
9.0 Package Dimensions (Reference)
....................................................................................................... 55
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