Conversion Timing Schemes; Errors Resulting From Clipping - Motorola ColdFire MCF5281 User Manual

Signal Connection Considerations
never transfer a full-scale value. If V
transfer a 0 value.
Figure 27-45 shows the results of reference voltages outside the range defined by V
and V . At the top of the input signal range, V
SSA
in a maximum obtainable 10-bit conversion value 0x03fe. At the bottom of the signal range,
V is 15 mV higher than V
SSA
of 0x0003.
3FF
3FE
3FD
3FC
3FB
3FA
8
7
6
5
4
3
2
1
0

27.9.3 Conversion Timing Schemes

This section contains some conversion timing examples. Figure 27-46 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.
27-64
is less than V
RL
, resulting in a minimum obtainable 10-bit conversion value
RL
.010 .020 .030
Inputs in Volts (V
Figure 27-45. Errors Resulting from Clipping
MCF5282 User's Manual
, the sample amplifier can never
SSA
is 10 mV lower than V
DDA
5.100 5.110 5.120
= 5.120 V, V = 0 V)
RH RL
DDA
. This results
RH
5.130
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