Dt Sheet. Holtek HTB Datasheet. Only three or four lines are required for the interface between the host controller and the HT The HT contains a power down command to reduce power consumption. Bump spacing: X Y Pad No.
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Post a Comment. Operating voltage:. Power Consumption:. Clock built-in :. Clock external :. Tone buzzer:. Data accessing:. Here is the functional block diagram directly extracted from the Holtek datasheet. In the sequel we will describe each of these blocks.
Figure 1. HT functional block diagram. This chip has a 32x4 bits static display RAM which is mapped directly to the display driver. Adresses are organized as displayed in Figure 2.
Memory structure of the HT Remark that we have. The system clock is used in a variety of tasks included LCD driving clock and tone frequency generation. An external KHz oscillator can also be used. The LCD screen will appear blank. We have written a library to deal with all the features of HT We provide procedures to software simulate the internal HT internal RAM and have transparent reading procedures. The simulated RAM is used as a default. We provide a very basic sketch for testing the main functions.
The library consists in only one header and an implementation files: HT In the next post we will provide a class for dealing with a generic 7-segments LCD module based on the HT chip with instruction set similar to the classical LiquidCrystal library here.
Finally, a class for a specific 7-seg LCD module that I found at bargains. No comments :. Subscribe to: Post Comments Atom.
HT1621B Holtek, HT1621B Datasheet
Post a Comment. Operating voltage:. Power Consumption:. Clock built-in :. Clock external :.
Download the Holtek HT1621 LCD Controller Datasheet