4D systems gen4-HMI Series, Техническое описание

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gen4-HMI Display Modules
gen4-uLCD-50D Page 6 of 29 www.4dsystems.com.au
I = Input, O = Output, P = Power
USER I/O – 30 Way FPC (continued)
Pin Symbol I/O Description
19 AUDIO_OUT O Audio Output, Filtered PWM, to feed into external amplifier
20 AUDENB O Audio Amplifier Enable, to enable/disable external amplifier
21 GND P Supply Ground
22 RESET I Master Reset signal. Internally pulled up to 3.3V via a 10K resistor. An active
Low pulse greater than 2 micro-seconds will reset the module. If the module
needs to be reset externally, only use open collector type circuits. This pin is
not driven low by any internal conditions. The host should control this pin via
one of its port pins using an open collector/drain arrangement.
23 RX0 I Asynchronous Serial Receive pin, TTL level. Connect this pin to the Transmit
(Tx) signal of other serial devices. Used in conjunction with the TX pin for
programming this microLCD. This pin is tolerant up to 5.0V levels.
24 TX0 O Asynchronous Serial Transmit pin, TTL level. Connect this pin to the Receive
(Rx) signal of other serial devices. Used in conjunction with the RX pin for
programming this microLCD. This pin is tolerant up to 5.0V levels.
25 GND P Supply Ground
26 5V IN P Main Voltage ve input pin. Reverse polarity protected. Range is 4.0V
to 5.5V, nominal 5.0V.
27 5V IN P Main Voltage ve input pin. Reverse polarity protected. Range is 4.0V
to 5.5V, nominal 5.0V.
28 NC - Not Connected
29 NC - Not Connected
30 GND P Supply Ground