Phytec 1337.1, Hardware Manual

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Components
©
PHYTEC Messtechnik GmbH 2011 L-758e_1
15
4 Components
4.1 Backlight Converter
There are four possibilities how to drive the backlight, given by the
settings of Dip switch S1. Please note that always only one of the four
switches should be closed while the other three should remain open.
Mode Switch to close Brightness
ON 1 maximum
Poti 2 controlled by Potentiometer R7
PWM 3 controlled by DISP_BRIGHT
OFF 4 No Backlight
Table 5: Possibilities how to control backlight brightness
On LCD-017 it is important to adjust the output current to the attached
display. For this purpose you’ll find Dip switch S2 and Dip switch S3.
S2 S3 Imax for Display
open open 152mA 050V
open close 213mA 070W
close open 213mA 070W
close close 258mA 104S
Table 6: Adjusting output current
4.2 Ambient Light Photo Sensor
Intended to give you the possibility to adjust the brightness of the
backlight automatically.
4.3 I
2
C-EEPROM
Reserved for further use with phyCARD-XL only.