Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Manual do Utilizador descarregar pdf (Página 105)

MAXQ Family User’s Guide:

MAXQ2010 Supplement

20-13

In x4 multiplexed mode, also known as 1/4 duty cycle mode, each segment pin can drive up to four LCD segments.

There are four common backplane signals, driven by COM0, COM1, COM2, and COM3. Each on segment is only

driven for 1/4 the frame period.

In each of the following examples, the LCD controller is driving a “2” to the display. This is a conventional 7-segment

display, and the “2” consists of on segments a, b, d, e, g, and DP as shown in Figure 20-4. The voltage waveforms

shown assume that V

ADJ

equals ground (R

ADJ

is set to 0I). The portions of the memory maps used apply to either

package type.

20.11 LCD Controller Static Drive Example

In this example, SEG0 to SEG7 are used to drive the LCD segments. The segments and common signals are con-

nected as shown in Figure 20-5.

Figure 20-4. Sample 7-Segment LCD Display

Figure 20-5. Static Drive Example Display Connection

COM0

SEG1

SEG2

SEG3

SEG5

SEG0

SEG7

SEG6

SEG4

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Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Manual do Utilizador Página 105