Specifications

MISCSET Register 2

Index: D Data Port Description

MISCSET 2 US05 US15 US012 US112 S5VEN S12VEN COMM1 COMM0

PWR 1 0 1 0 0 0 0 0

r/w r/w r/w r/w r/w r/w r/w r/w

D7 D6 D5 D4 D3 D2 D1 D0

Bit Name Function

7 US05 Enable 5 Volt supply voltage for display through LCDEN pin

of the WD90C24 chip

0 = Enable through LCDEN off

1 = Enable through LCDEN on

6 US15 Enable 5 Volt supply voltage for display through PNLOFF pin

of WD90C24 chip

0 = Enable through PNLOFF off

1 = Enable through PNLOFF on

5 US012 Enable 12 Volt supply voltage and contrast voltage for display

through delayed LCDEN signal of the WD90C24 chip

0 = Enable through delayed LCDEN off

1 = Enable through delayed LCDEN on

4 US112 Enable 12 Volt supply voltage and contrast voltage for display

through PNLOFF signal of the WD90C24 chip

0 = Enable through PNLOFF off

1 = Enable through PNLOFF on

3 S5VEN Enable 5 Volt supply voltage for display

0 = 5 Volt off

1 = 5 Volt on

2 S12VEN Enable 12 Volt supply voltage and contrast voltage for display

0 = 12 Volt off

1 = 12 Volt on

1 COMM1 Select mode for COMB

0 = RS232 mode

1 = RS485 / RS422 mode

0 COMM0 Select mode for COMA

0 = RS232 mode

1 = RS485 / RS422 mode