
MC68F375
QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE-64
MOTOROLA
REFERENCE MANUAL
Rev. 25 June 03
5-42
5.12.8 QADC64 Status Register 0 (QASR0)
QASR0 contains information about the state of each queue and the current A/D con-
version. Except for the four flag bits (CF1, PF1, CF2, and PF2) and the two trigger
overrun bits (TOR1 and TOR2), all of the status register fields contain read-only data.
Table 5-15 Queue 2 Operating Modes
MQ2
Operating Modes
00000
Disabled mode, conversions do not occur
00001
Software triggered single-scan mode (started with SSE2)
00010
External trigger rising edge single-scan mode
00011
External trigger falling edge single-scan mode
00100
Interval timer single-scan mode: interval = QCLK period x 27
00101
Interval timer single-scan mode: interval = QCLK period x 28
00110
Interval timer single-scan mode: interval = QCLK period x 29
00111
Interval timer single-scan mode: interval = QCLK period x 210
01000
Interval timer single-scan mode: interval = QCLK period x 211
01001
Interval timer single-scan mode: interval = QCLK period x 212
01010
Interval timer single-scan mode: interval = QCLK period x 213
01011
Interval timer single-scan mode: interval = QCLK period x 214
01100
Interval timer single-scan mode: interval = QCLK period x 215
01101
Interval timer single-scan mode: interval = QCLK period x 216
01110
Interval timer single-scan mode: interval = QCLK period x 217
01111
Reserved mode
10000
Reserved mode
10001
Software triggered continuous-scan mode (started with SSE2)
10010
External trigger rising edge continuous-scan mode
10011
External trigger falling edge continuous-scan mode
10100
Periodic timer continuous-scan mode: period = QCLK period x 27
10101
Periodic timer continuous-scan mode: period = QCLK period x 28
10110
Periodic timer continuous-scan mode: period = QCLK period x 29
10111
Periodic timer continuous-scan mode: period = QCLK period x 210
11000
Periodic timer continuous-scan mode: period = QCLK period x 211
11001
Periodic timer continuous-scan mode: period = QCLK period x 212
11010
Periodic timer continuous-scan mode: period = QCLK period x 213
11011
Periodic timer continuous-scan mode: period = QCLK period x 214
11100
Periodic timer continuous-scan mode: period = QCLK period x 215
11101
Periodic timer continuous-scan mode: period = QCLK period x 216
11110
Periodic timer continuous-scan mode: period = QCLK period x 217
11111
Reserved mode
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