User guide

28 • Registers
3.4 A/D control Register
This register controls the A/D channels to be converted. It is a write only
register. When the channel number is written to the register, the multiplexer
switches to the new channel and waits for the conversion.
Address: BASE + 18
Attribute: write only
Data Format:
Bit 7 6 5 4 3 2 1 0
Base + 18 MUX Auto-Scan A/D Mode
Base + 19 --- --- --- GAIN MUX
Base + 1A --- --- --- --- --- --- --- ---
Base + 1B --- --- --- --- --- --- --- ---
A/D Mode:
Bit 3 Bit 2 Bit 1 Bit 0
EITS TSTS INTX DMAX
EITS: External / Internal Trigger Source
1: External Trigger Source
0: Internal Trigger Source
TPST: Timer Pacer/ Software Trigger
1: Timer Pacer Trigger
0: Software Trigger
(It is only available when the Internal Trigger Source is selected)
INTX: Interrupt Transfer Mode
1: Enable Interrupt Transfer
0: Disable Interrupt Transfer
DMAX: DMA Transfer Mode (bus mastering)
1: Enable DMA Data Transfer
0: Disable DMA Data Transfer