A/D And D/A Control/Status Register - VersaLogic Copperhead VL-EBX-41 Reference Manual

A/D and D/A Control/Status Register

This register is used to control A/D and D/A conversion.
ADCONSTAT (Read/Write) CAFh
D7
Reserved
Bit Mnemonic
D7-D6 Reserved
D5 DACLDA1
D4 DACLDA0
D3 ADCBUSY1
D2 ADCBUSY0
D1 ADCONVST1
D0 ADCONVST0
EBX-41 Reference Manual
D6 D5
Reserved DACLDA1 DACLDA0
Table 35: A/D, D/A Control/Status Register Bit Assignments
Description
These bits are reserved. Only write 0 to these bits and ignore all read values.
This is a write-only (pulsed) bit. When a '1' is written it will strobe the LDAC signal
on the LTC2634 D/A Converter for channels 4-8. Writing a '0' is ignored. LDAC is
only used to update all 4 channels in one operation.
This is a write-only (pulsed) bit. When a '1' is written it will strobe the LDAC signal
on the LTC2634 D/A Converter for channels 1-4. Writing a '0' is ignored. LDAC is
only used to update all 4 channels in one operation.
This read-only status bit returns the conversion status for the LTC1857 A/D for
channels 9-16
0 – A/D is idle.
1 – A/D is busy doing a conversion.
This read-only status bit returns the conversion status for the LTC1857 A/D for
channels 1-8
0 – A/D is idle.
1 – A/D is busy doing a conversion.
This is a write-only (pulsed) bit. When a '1' is written it will start a conversion on
the LTC1857 A/D converter for channels 9-16. Writing a '0' is ignored.
This is a write-only (pulsed) bit. When a '1' is written it will start a conversion on
the LTC1857 A/D converter for channels 1-8. Writing a '0' is ignored.
D4 D3
ADCBUSY1 ADCBUSY0 ADCONVST1 ADCONVST0
Special Registers
D2 D1 D0
67