NEC 78K0/Fx2, Руководство пользователя

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78K0/Fx2 – CAN it!
3.9 Display D1, 12*2 character LC display
The 78K0/Fx2 – CAN it! board is equipped with a character LC display. The display font is equal to 12
character words at 2 lines. The LCD module contains about a character generator ROM - including
predefined standard characters - and a character RAM where the user can define its own characters. The
display is connected to the 78K0/FF2 device via three control lines and eight data lines.
Display Pin Display Signal Port 78K0/FF2
78K0/Fx2- CAN it!
baseboard
1 Vss - GND
2 Vcc - Vcc
3 V0 - R7 potentiometer arm
4 RS P66 -
5 R/W P65 -
6 E P64 -
7 DB0 P40 -
8 DB1 P41 -
9 DB2 P42 -
10 DB3 P43 -
11 DB4 P44 -
12 DB5 P45 -
13 DB6 P46 -
14 DB7 P47 -
15 A - Vcc via diode
Table 10: Display connections
For more details about the LC display specification, commands and character table, please refer to the
corresponding User’s Manual “WH1202A-NFA-ET.pdf” located in the
/doc
folder of the 78K0/Fx2 – CAN
it! .
3.10 External Potentiometer R14
A 47K potentiometer R14 is connected between Vcc and ground. The potentiometer arm is connected to
port P80 of 78K0/FF2 device. This is equal to the ANI0 analogue input.
3.11 AD converter reference voltage input
A 1.2V reference voltage is supplied to the ANI1 analogue input, equal to port P81 of 78K0/FF2 device.
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