QADC64E Enhanced Mode Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
14-6
Freescale Semiconductor
channel field of the conversion command word (CCW) table. External Multiplex mode is software
selectable, by setting the EMUX bit of control register 0 (QACR0).
shows the maximum configuration of four external multiplexer chips connected to the QADC.
The QADC provides three multiplexer address signals – MA0, MA1, MA2 – to select one of the
multiplexer chips. These outputs are the multiplexer control lines and they are connected to all external
multiplexer chips.
The analog output of each of the four multiplexer chips is connected to four separate QADC inputs – ANw,
ANx, ANy, ANz. These signals are the first four signals of port B and each one can represent eight analog
input channels. The QADC converts the proper input channel (ANw, ANx, ANy, ANz) by interpreting the
channel number in the CCW. Refer to
.
Figure 14-3. Example of External Multiplexing
I
Table 14-3. Multiplexed Analog Input Channels
Multiplexed Analog Input
Channels
ANw (AN44)
0 through 7
ANx (AN45)
8 through 15
ANy (AN46)
16 through 23
ANz (AN47)
24 through 31
AN52/MA0/PQA0
AN53/MA1/PQA1
AN54/MA2/PQA2
AN55/PQA3
AN56/PQA4
AN57/PQA5
AN58/PQA6
AN59/PQA7
AN44/ANw/PQB0
AN45/ANx/PQB1
AN46/ANy/PQB2
AN47/ANz/PQB3
AN48/PQB4
AN49/PQB5
AN50/PQB6
AN51/PQB7
V DDA
V SSA
VRL
V
RH
MUX
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
MUX
AN8
AN9
AN10
AN11
AN12
AN13
AN14
AN15
MUX
AN16
AN17
AN18
AN19
AN20
AN21
AN22
AN23
MUX
AN24
AN25
AN26
AN27
AN28
AN29
AN30
AN31
ANALOG POWER
ANALOG REFERENCES
PO
R
T
B
PO
R
T
A
QADC
DIGITAL
CONTROL
ANALOG
CONVERTER
ANALOG
MULTIPLEXER
PORT LOGIC
AND
ETRIG1
ETRIG2
External Triggers:
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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...