Special Peripherals, Configuration; Special Peripherals; Multifunction Latch; Programmable Contrast, Backlight And Speaker Volume - DIGITAL-LOGIC MICROSPACE PC/104 Technical User's Manual

DIGITAL-LOGIC AG
9 S
PECIAL
9.1

Special Peripherals

9.1.1

Multifunction Latch

The multifunction latch allows control over several functions such as powerdown, contrast and watch-
dog. This latch can be controlled by the application program.
Latch 1:
MSM486V
WDOG-ENA
SSD-A16
SSD-A17
SSD-A18
SSD-A19
EEPROM
EEPROM
EEPROM
Latch 2:
MSM486V
Serial EEPROM
Data Input 1
Data Input 2
Data Input 3
nc
nc
nc
nc
Pascal 6 Example (Example for Watchdog)
Program Watchdog;
uses Crt;
Var I : INTEGER;
Begin
CLRscr;
Writeln ('Programm Watchdog Start ');
Port[$201]:=$01;
For I:=1 to 5 do
Begin
Port[$201]:=$00;
Port[$201]:=$65;
Gotoxy (2,2) ; Writeln ('Programm : ', I);
delay(800); {With 1400-2000 the WDOG make a reset}
end;
Port[$201]:=$00;
Writeln ('Programm Ende');
end.
9.1.2

Programmable Contrast, Backlight and Speaker volume

P
ERIPHERALS
Programming address is:
Function:
0 = DIS, 1 = ENA
MSB
Clock
Data Output / WDOG = STR
Select (active low)
Programming address is:
Function:
Data input
Switch1
Switch2
Switch3
50
MSM486V Manual V3.22
, C
ONFIGURATION
201 hex (write only)
Bit Number:
0
1
2
3
4
5
6
7
201 hex (read only)
Bit Number:
0
1
2
3
4
5
6
7