PS081 datasheet(71/155 Pages) AMSCO

71 / 155 page

acam-messelectronic gmbh - Friedrich-List-Str.4 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de

4-14

PSØ81

Configuration:

lcd_spi_ena

1 =

Switch on SPI Master Mode on LCD pins

lcd_duty

2 =

It is necessary to set a duty mode to use the LCD as SPI master driver

(1 = ½ duty, 2 = 1/3 duty, 3 = ¼ duty)

lcd_directdrive

1 =

LCD supplied directly by Vcc

lcd_standby

0 =

LCD voltage generation can be switched off.

Example2:

Seg

3,6,9...

2,5,8...

1,4,7...

3,6,9...

2,5,8...

1,4,7...

Com1

then

lcd_pos

[20...18]

= 7

lcd_pos

[11...9]

= 4

lcd_pos

[2...0]

= 3

Com2

lcd_pos

[23...21]

= 5

lcd_pos

[14...12]

= 6

lcd_pos

[5...3]

= 2

Com3

lcd_pos

[17...15]

= 0

lcd_pos

[8...6]

= 1

lcd_pos[23...0] = 101111000110100001010011

= 0xBC6853

** Special symbols are fixed by LCD design and can not be rearranged. It has to be taken care that those segments are connected to Com3

and Seg3,6,9... Lines

4.3

Support of an External LCD Driver

PSØ81 offers the possibility to control an external LCD driver. Therefore a simplified SPI master

mode was implemented, especially adopted to Holtek HT1621 and FM µpd7225 devices.

For the SPI interface pins of the LCD driver are used. Up to 6 pins have to be used in parallel to have

enough driver power.

Connecting an external LCD driver circuit:

Figure 4.10 External LCD Driver

Member of the ams Group

PS081 Datasheet(PDF) 71 Page - ams AG

PS081 Datasheet(HTML) 71 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL