Advantech PCI-1755, User Manual

Page: 59 / 85

53
C.14 DI Status Register--- BASE+0 H
Table C-13 PCI-1755 Register for DI Status
Base
Addr.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
DI Status Register
00H R
STP1 STP0 STR1 STR0 SC2 SC1 SC0 M1 M0
DI Status Register
02H R
OV FF FH FE HS0
CLK
RF
ACK
RF
REQ
RF
STP
RF
STR
RF
1. M1:M0 = Digital input mode
00 Disable
01 Normal mode
10 Handshaking mode
2. SC2:SC0 = Sampling clock select
000 Disable
001 30 MHz sampling clock
010 15 MHz sampling clock
011 10 MHz sampling clock
100 Timer0 output of 8254
101 External clock input by EXT_CLKIN
3. STR1:STR0 = Start mode of normal mode
00 Disable
01 Software command
10 Trigger signal occurred from DI_STR
11 Pattern DI
4. STP1:STP0 = Stop mode of normal mode
00 Disable
01 Software command
10 Trigger signal occurred from DI_STP
11 Pattern DI
5. STRRF = DI_STR triggering control
0 Rising edge trigger
1 Falling edge trigger
6. STPRF = DI_STP triggering control
0 High level active
1 Low level active