QADC64E Legacy Mode Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
13-64
Freescale Semiconductor
•
Q1 RES shows relative result register updates
Figure 13-46. External Trigger Mode (Positive Edge) Timing with Pause
Recall QS = 0 => Queues disabled; QS = 8 => Q1 active, Q2 disabled; QS= 4 => Q1 paused, Q2 disabled.
A time separator was provided between the triggers and end of conversion (EOC). The relationship to
QCLK displayed is not guaranteed.
CWPQ1 and CWPQ2 typically lag CWP and only match CWP when the associated queue is inactive.
Another way to view CWPQ1 and CWPQ2 is that these registers update when EOC triggers the result
register to be written.
When the pause bit is set (CCW0), please note that CWP does not increment until triggered. When the
pause is not set (CCW1), the CWP increments with EOC.
The conversion results Q1 RES(x) show the result associated with CCW(x). So that R0 represents the
result associated with CCW0.
Example 2 below shows the timing for conversions in gated mode single-scan with the
same assumptions as example 1 except:
•
No pause bits set in any CCW
•
External trigger gated single-scan mode for Q1
•
Single-scan bit is set
When the gate closes and opens again the conversions start with the first CCW in Q1.
When the gate closes the active conversion completes before the queue goes idle.
When Q1 completes both the CF1 bit sets and the SSE bit clears.
QCLK
Trig1
EOC
QS
CWP
CWPQ1
Q1 RES
CCW1
0
4
CCW0
LAST
CCW1
CCW2
8
4
8
R0
R1
Conversion time is >= 14 QCLKS
CCW0
LAST
Time between triggers
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...