QADC64E Legacy Mode Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
13-6
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 – MA[0], MA[1], MA[2] – 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 13-3. Example of External Multiplexing
In the external multiplexed mode, four of the port B signals are redefined to each represent eight input
channels. Refer to
for more information.
AN[52]/MA[0]/PQA[0]
AN[53]/MA[1]/PQA[1]
AN[54]/MA[2]/PQA[2]
AN[55]/PQA[3]
AN[56]/PQA[4]
AN[57]PQA[5]
AN[58]/PQA[6]
AN[59]/PQA[7]
AN[0]/ANw/PQB[0]
AN[1]/ANx/PQB[1
]
AN[2]/ANy/PQB[2
]
AN[3]/ANz/PQB[3]
AN[48]/PQB[4]
AN[49]/PQB[5]
AN[50]/PQB[6]
AN[51]/PQB[7]
VDDA
V SSA
VRL
V
RH
MUX
AN[0]
AN[2]
AN[6]
AN[8]
AN[10]
AN[12]
AN[14]
MUX
MUX
MUX
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:
AN[4]
AN[1]
AN[3]
AN[7]
AN[9]
AN[11]
AN[13]
AN[15]
AN[5]
AN[16]
AN[18]
AN[22]
AN[24]
AN[26]
AN[28]
AN[30]
AN[20]
AN[17]
AN[19]
AN[23]
AN[25]
AN[27]
AN[29]
AN[31]
AN[21]
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...