Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Uživatelský manuál stáhnout pdf (Strana 107)

MAXQ Family User’s Guide:

MAXQ2010 Supplement

20-15

20.12 LCD Controller 1/2 Duty Cycle Drive Example

In this example, SEG0 to SEG3 are used to drive the LCD segments. The segments and common signals are con-

nected as shown in Figure 20-7.

According to the 1/2 duty drive memory map table, a value of 0DEh should be written to the LCD0 register as shown

in Table 20-10.

20.13 LCD Controller 1/3 Duty Cycle Drive Example

In this example, SEG0 to SEG2 are used to drive the LCD segments. The segments and common signals are con-

nected as shown in Figure 20-9 .

According to the 1/3 duty drive memory map table, LCD0 should be set to 071h and LCD1 should be set to 05h as

shown in Table 20-12.

Figure 20-7. 1/2 Duty Drive Example Display Connection

Table 20-9. 1/2 Duty Drive Example Common Signal Selection

Table 20-10. 1/2 Duty Drive Example Register Content

SEG3SEG2SEG1

SEG0

COM1COM0

SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0

COM0

On On On Off

COM1

On Off On On

COM2

COM3

BIT 7

COM1

BIT 6

COM0

BIT 5

COM1

BIT 4

COM0

BIT 3

COM1

BIT 2

COM0

BIT 1

COM1

BIT 0

COM0

LCD0

1 1 0 1 1 1 1 0

LCD1

LCD2

LCD3

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 146 147

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