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Queued Analog-to-Digital Converter (QADC)
28-58 Freescale Semiconductor
Figure 28-45. Errors Resulting from Clipping
28.9.3 Conversion Timing Schemes
This section contains some conversion timing examples. Figure 28-46 shows the timing for basic
conversions where it is assumed that:
Q1 begins with CCW0 and ends with CCW3.
CCW0 has pause bit set.
CCW1 does not have pause bit set.
External trigger rising edge for Q1
CCW4 = BQ2 and Q2 is disabled.
Q1 RES shows relative result register updates.
Recall that when QS = 0, both queues are disabled; when QS = 8, queue 1 is active and queue 2 is idle;
and when QS = 4; queue 1 is paused and queue 2 is disabled.
0 .020 5.100 5.110
1
2
3
4
5
6
7
8
3FA
3FB
3FC
3FD
3FE
3FF
.010 .030 5.120 5.130
10-bit Result (Hexadecimal)
Inputs in Volts (V
RH
= 5.120 V, V
RL
= 0 V)
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3