Diamond Power Products MM-48-AT - Manual (Page 19)

Diamond-MM-48-AT User Manual V1.01 Page 19
Base + 9 Read Configuration & Status Register
Bit
No. 7 6 5 4 3 2 1 0
Name ADBUSY DABUSY CKSEL1 CKFRQ1 CKFRQ0 SCNINT CLKEN CLKSEL
ADBUSY A/D chip status:
1 A/D conversion or scan is in progress or A/D input circuit in settling mode
0 A/D is idle
Do not attempt to start a new A/D conversion or scan when ADBUSY = 1.
DABUSY D/A chip status:
1 D/A conversion is in progress
0 D/A is idle
Do not attempt to start a new D/A conversion when DABUSY = 1.
CKSEL1 Clock source select for counter/timer 1:
1 External signal Clk0 in I/O connector J3
0 On-board clock, frequency selected by CKFRQ1 below
CKFRQ1 Clock frequency select for counter/timer 1 when CKSEL1 = 0:
1 100KHz
0 10MHz
CKFRQ0 Clock frequency select for counter/timer 0:
1 1MHz
0 10MHz
SCNINT Scan interval. This is the time between A/D samples during an A/D scan. An A/D
scan occurs when SCANEN = 1 (Base + 10 bit 4) and an A/D conversion is
triggered.
1 5.0µS
1 9.3µS
CLKEN Enable hardware A/D clock:
1 Enable hardware A/D trigger (source is selected with CLKSEL bit); software
triggers are disabled
0 Disable hardware trigger; A/D is triggered by setting the ADSTART bit
CLKSEL A/D clock select, used only when CLKEN = 1:
1 Internal clock: counter/timer 0 generates A/D conversions
0 External clock: the EXTCLK pin on I/O connector J3, generates A/D
conversions