QADC64E Legacy Mode Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
13-20
Freescale Semiconductor
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.
13.3.8
Status Registers (QASR0 and QASR1)
The status registers contains information about the state of each queue and the current A/D conversion.
Except for the four flag bits (CF1, PF1, CF2, and PF2) and the two trigger overrun bits (TOR1 and TOR2),
01011
Interval timer single-scan mode: time = QCLK period x 2
14
01100
Interval timer single-scan mode: time = QCLK period x 2
15
01101
Interval timer single-scan mode: time = QCLK period x 2
16
01110
Interval timer single-scan mode: time = QCLK period x 2
17
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 2
7
10101
Periodic timer continuous-scan mode: time = QCLK period x 2
8
10110
Periodic timer continuous-scan mode: time = QCLK period x 2
9
10111
Periodic timer continuous-scan mode: time = QCLK period x 2
10
11000
Periodic timer continuous-scan mode: time = QCLK period x 2
11
11001
Periodic timer continuous-scan mode: time = QCLK period x 2
12
11010
Periodic timer continuous-scan mode: time = QCLK period x 2
13
11011
Periodic timer continuous-scan mode: time = QCLK period x 2
14
11100
Periodic timer continuous-scan mode: time = QCLK period x 2
15
11101
Periodic timer continuous-scan mode: time = QCLK period x 2
16
11110
Periodic timer continuous-scan mode: time = QCLK period x 2
17
11111
Reserved mode
Table 13-13. Queue 2 Operating Modes (continued)
MQ2[3:7]
Operating Modes
Summary of Contents for MPC561
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Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
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