Dot-matrix STN LCD Driver With 32-row X 80-column Display Data Memory

Both the SBN1661G_M18 and the SBN1661G_M02 CAN drive 16 COMMONs and 61 SEGMENTs and CAN be used as master in a master-slave connection. They both have 32-row x 80-column Display Data Memory. Functionally, their only difference is that the SBN1661G_M18 has an on-chip RC-type Oscillator and CAN provide Clock to slave, while the SBN1661G_M02 does not have an on-chip Oscillator and needs external Clock source. Both the SBN0080G_S18 and the SBN0080G_S02 are purely SEGMENT drivers. They do not have COMMON outputs and are used for segment expansion in a master-slave connection. Both devices need either a master or an external Clock source to provide Clock The only difference between these two chips is their operating frequency. The SBN0080G_S18s operating frequency is 18 KHz, while the SBN0080G_S02s operating frequency is 2KHz. All four devices have on-chip Display Data Memory of 32-rows x 80-columns, for storing Display data. Dot-matrix mapping method is used to drive the LCD panel. Therefore, a bit of the Display Data Memory corresponds to a pixel on the LCD panel. SEGMENT drivers provide Display data to the LCD panel and COMMON drivers provide row-scanning signal. All four devices have a set of internal Registers These internal Registers must be properly programmed to ensure proper operation of the devices. Display on the LCD panel is controlled by a host Microcontroller All four devices communicate with the host Microcontroller via data bus and control bus. The data bus is 8-bit wide. The control bus are READ, WRITE, and Chip Select. The host Microcontroller CAN perform READ/WRITE operations to the internal Registers and Display Data RAM of all four devices. A wide variety of Microcontrollers CAN easily Interface with the devices, as the devices CAN accept both 80-type Interface Timing and 68-type Interface Timing The selection of Interface Timing is via the dual-function RESET/IF pin. By Avant Electronics Corporation