JSMSEMI JSM1621B

The JSM1621 is a 128 pattern (32×4), memory mapping, and multi - function LCD driver. The S/W configuration feature of the JSM1621 makes it suitable for multiple LCD applications including LCD modules and display sub - systems. Only three or four lines are required for the interface between the host controller and the JSM1621. The JSM1621 contains a power down command to reduce power consumption.

• Operating voltage: 2.4V~5.2V
• Built - in 256kHz RC oscillator
• External 32.768kHz crystal or 256kHz frequency source input
• Selection of 1/2 or 1/3 bias, and selection of 1/2 or 1/3 or 1/4 duty LCD applications
• Internal time base frequency sources
• Two selectable buzzer frequencies (2kHz/4kHz)
• Power down command reduces power consumption
• Built - in time base generator and WDT
• Timebase or WDT overflow output
• 8 kinds of timebase/WDT clock sources
• 32×4 LCD driver
• Built - in 32×4 bit display RAM
• 3 - wire serial interface
• Internal LCD driving frequency source
• Software configuration feature
• Data mode and command mode instructions
• R/W address auto increment
• Three data accessing modes
• VLCD pin for adjusting LCD operating voltage