Matrix Orbital LCD2041 - Manual (Page 14)

WARNING Do not apply voltage through pin 9 of the DB-9 connector
AND through the Power/Data Connector at the same time.
2.2 Power/Data Connector
The Power/Data Connector provides a standard connector for powering the display module. The LCD2041
requires five volts for the standard display module, between nine to fifteen for the wide voltage (V) and be-
tween nine to thirty-five volts for the wide voltage with efficient power supply module (VPT). The voltage is
applied through pins one and four of the four pin Power/Data connector. Pins two and three are reserved for
serial transmission, using either the RS-232/TTL or the I
2 C protocol, depending on what has been selected
by the Protocol Select Jumpers. Pins two and three may be reversed by changing the Legacy Connector
Jumpers in order to be compatible with previous PCB revisions.
Pin 1 PWR (See table 1)
Pin 2 Rx \ SCL (I 2 C clock)
Pin 3 Tx \ SDA (I 2 C data)
Pin 4 GND
Figure 15: Power Connector and Pin out
Table 1: Power Requirements
Standard -V -VPT
Supply Voltage +5Vdc ±0.25V +9V to +15V +9V to +35V
Supply Current 11 mA typical
Supply Backlight Current 160 mA typical
WARNINGS
• Do not apply any power with reversed polarization.
• Do not apply any voltage other than the specified voltage.
Matrix Orbital LCD2041 10