MOTOROLA
Chapter 13. Queued Analog-To-Digital Converter (QADC64E)
13-23
Programming the QADC64E Registers
NOTE
If BQ2 was assigned to the CCW that queue 1 is currently
working on, then that conversion is completed before BQ2
takes effect.
Each time a CCW is read for queue 1, the CCW location is compared with the current value
of the BQ2 pointer to detect a possible end-of-queue condition. For example, if BQ2 is
changed to CCW3 while queue 1 is converting CCW2, queue 1 is terminated after the
conversion is completed. However, if BQ2 is changed to CCW1 while queue 1 is
converting CCW2, the QADC64E would not recognize a BQ2 end-of-queue condition until
queue 1 execution reached CCW1 again, presumably on the next pass through the queue.
00100
Interval timer single-scan mode: time = QCLK period x 27
00101
Interval timer single-scan mode: time = QCLK period x 28
00110
Interval timer single-scan mode: time = QCLK period x 29
00111
Interval timer single-scan mode: time = QCLK period x 210
01000
Interval timer single-scan mode: time = QCLK period x 211
01001
Interval timer single-scan mode: time = QCLK period x 212
01010
Interval timer single-scan mode: time = QCLK period x 213
01011
Interval timer single-scan mode: time = QCLK period x 214
01100
Interval timer single-scan mode: time = QCLK period x 215
01101
Interval timer single-scan mode: time = QCLK period x 216
01110
Interval timer single-scan mode: time = QCLK period x 217
01111
Reserved mode
10000
Reserved mode
10001
Software triggered continuous-scan mode
10010
External trigger rising edge continuous-scan mode
10011
External trigger falling edge continuous-scan mode
10100
Periodic timer continuous-scan mode: time = QCLK period x 27
10101
Periodic timer continuous-scan mode: time = QCLK period x 28
10110
Periodic timer continuous-scan mode: time = QCLK period x 29
10111
Periodic timer continuous-scan mode: time = QCLK period x 210
11000
Periodic timer continuous-scan mode: time = QCLK period x 211
11001
Periodic timer continuous-scan mode: time = QCLK period x 212
11010
Periodic timer continuous-scan mode: time = QCLK period x 213
11011
Periodic timer continuous-scan mode: time = QCLK period x 214
11100
Periodic timer continuous-scan mode: time = QCLK period x 215
11101
Periodic timer continuous-scan mode: time = QCLK period x 216
11110
Periodic timer continuous-scan mode: time = QCLK period x 217
11111
Reserved mode
Table 13-13. Queue 2 Operating Modes (continued)
MQ2[3:7]
Operating Modes