HTB RAM Mapping 32×4 LCD Controller For I/o uc Features. Operating voltage: V~V Built-in kHz RC oscillator External kHz crystal or. Holtek HTB: available from 7 distributors. Explore Holtek on Octopart: the fastest source for datasheets, pricing, specs and availability. HT/HTG RAM Mapping 32´4 LCD Controller for I/O MCU PATENTED PAT No.: TW Features · Operating voltage: V~V · 32´4 LCD driver .

Author: Golabar Gardall
Country: New Zealand
Language: English (Spanish)
Genre: Art
Published (Last): 12 October 2006
Pages: 30
PDF File Size: 8.9 Mb
ePub File Size: 2.27 Mb
ISBN: 308-3-34965-369-1
Downloads: 31627
Price: Free* [*Free Regsitration Required]
Uploader: Faezahn

We provide procedures to software simulate the internal HT internal RAM and have transparent reading procedures. If the CS pin is set to 1, the data and command issued between the host controller and the HT are first disabled and then initialized.

HT1621B PDF Datasheet浏览和下载

Adresses are organized as displayed in Figure 2. Memory structure of the HT The frequency is calculated by the following equation. If the system clock comes from an external clock source, the external clock source dstasheet be connected to the OSCI pad.

Calculation of the frequency is based on the system frequency sources as stated above. This chip has a 32×4 bits static display RAM which is mapped directly to the display driver. Command The mode command should be issued before the data or command is transferred. The bold form of 1 0 0, namely 1 0 0, indicates the command mode ID.


For the most up-to-date information, please visit our web site at http: Finally, a class for a specific 7-seg LCD module that I found at bargains. The HT contains a power down command to reduce power consumption. The LCD corresponding commands are summarized in the table. The table illustrates the suggestion value of capacities C1, C2. If successive commands have been issued, the command mode ID except for the first command will be omitted.

HT1621B Datasheet

The information appearing in this Data Sheet is believed to be accurate at the time of publication. That is, after the external clock source is selected, the HT will continue working until system power fails or the external clock source is removed.

The CS line is used to initialize the serial interface circuit and to terminate the communication between the dwtasheet controller and the HT Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.

The clocked out data will appear on the DATA line.

Remark that we have. The simulated RAM is used as a default. But if the external clock source is chosen as the system clock, using the SYS DIS command can neither turn the oscillator off nor carry out the power down mode. We suggest that you can follow the table, which suggests the value of capacities. Data to be read or written or commands to be written have to be passed through the DATA line.


The 32kHz in the above equation indicates that the source of the system frequency is derived from a crystal oscillator of Power on reset default All the bold forms, namely 1 1 0, 1 0 1, and 1 0 0, are mode commands. Employing both the time base generator and the WDT related commands, one should be careful since the time base generator and WDT share the same 8-stage counter.

In the sequel we will describe each of these blocks. The LCD screen will appear blank.

HT/HTG – Product Details – Holtek

These are stress ratings only. If an on-chip oscillator kHz or an external kHz frequency is chosen as the source of the system frequency, the frequency source is by default prescaled to 32kHz by a 3-stage prescaler. The applications mentioned herein are dafasheet solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life hr1621b to malfunction or otherwise.

The value of the driving clock is always Hz even when it is at a