MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 19-95
three least significant bits of the channel number that selects ANW, ANX, ANY, and ANZ with MA0 being
the most significant bit - See Table 19-53.
When the external multiplexed mode is selected for either ADC, the eQADC automatically creates the MA
output signals from CHANNEL_NUMBER field of a command message. The eQADC also converts the
proper input channel (ANW, ANX, ANY, and ANZ) by interpreting the CHANNEL_NUMBER field. As
a result, up to 32 externally multiplexed channels appear to the conversion queues as directly connected
signals.
Table 19-53. Encoding of MA Pins
1
1
0 means pin is driven LOW and 1 that pin is driven HIGH.
Channel Number selecting ANW, ANX, ANY, ANZ
(decimal)
MA0 MA1 MA2
ANW ANX ANY ANZ
64 72 80 88 0 0 0
65 73 81 89 0 0 1
66 74 82 90 0 1 0
67 75 83 91 0 1 1
68 76 84 92 1 0 0
69 77 85 93 1 0 1
70 78 86 94 1 1 0
71 79 87 95 1 1 1
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