QADC64E Legacy Mode Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
13-41
and the pause flag is not set. The QADC64E sets the completion flag and the queue status becomes idle.
Examples of this situation are:
•
The pause bit is set in CCW10 and EOQ is programmed into CCW10
•
During queue 1 operation, the pause bit set in CCW32, which is also BQ2
13.5.4
Scan Modes
The QADC64E queuing mechanism allows the application to utilize different requirements for
automatically scanning input channels.
In single-scan mode, a single pass through a sequence of conversions defined by a queue is performed. In
continuous-scan mode, multiple passes through a sequence of conversions defined by a queue are
executed. The possible modes are:
•
Disabled and reserved mode
•
Single-scan modes
— Software initiated single-scan mode
— External trigger single-scan mode
— External gated single-scan mode
— Periodic/Interval timer single-scan mode
•
Continuous-scan modes
— Software initiated continuous-scan mode
— External trigger continuous-scan mode
— External gated continuous-scan mode
— Periodic/Interval timer continuous-scan mode
The following paragraphs describe single-scan and continuous-scan operations.
13.5.4.1
Disabled Mode
When the disabled mode is selected, the queue is not active. Trigger events cannot initiate queue execution.
When both queue 1 and queue 2 are disabled, wait states are not encountered for IMB3 accesses of the
RAM. When both queues are disabled, it is safe to change the QCLK prescaler values.
13.5.4.2
Reserved Mode
Reserved mode allows for future mode definitions. When the reserved mode is selected, the queue is not
active. It functions the same as disabled mode.
CAUTION
Do not use a reserved mode. Unspecified operations may result.
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...