Prometheus CPU User Manual V1.44
Page 40
Base + 7
Write
DAC MSB + Channel No.
Bit
No. 7 6 5 4 3 2 1 0
Name DACH1
DACH0
X X DA11
DA10
DA9
DA8
DACH1–0 D/A channel. The value written to Base + 6 and Base + 7 are written to the selected
channel, and that channel is updated immediately. The update takes approximately
20 microseconds due to the DAC serial interface.
DA11–8
D/A bits 11 - 8; DA11 is the MSB. D/A data is an unsigned 12-bit value.
Base + 7
Read
Analog Operation Status
Bit
No. 7 6 5 4 3 2 1 0
Name DMAINT
TINT
DINT
AINT ADCH3
ADCH2 ADCH1 ADCH0
DMAINT
DMA interrupt status. 1 = interrupt pending, 0 = interrupt not pending.
TINT
Timer interrupt status, same values as above.
DINT
Digital I/O interrupt status, same values as above.
AINT
Analog input interrupt status, same values as above.
ADCH3-0 Current A/D channel. This is the channel that will be sampled on the
next
conversion.
When any of bits 7–4 are 1, the corresponding circuit is requesting service. The interrupt routine
must poll these bits to determine which circuit needs service and then act accordingly.
