QADC64E Legacy Mode Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
13-7
I
shows the total number of analog input channels supported with zero to four external
multiplexer chips using one QADC module.
NOTE: QADC64E External MUX Users
If either QADC64E_A or QADC64E_B is in external multiplexing
(EMUX) mode then the multiplexer address signal channels, AN[52:54]
should
not
be programmed into queues.
13.3
Programming the QADC64E Registers
The QADC64E has three global registers for configuring module operation:
•
Module configuration register (
Section 13.3.1, “QADC64E Module Configuration Register
”)
•
Interrupt register (
Section 13.3.2, “QADC64E Interrupt Register (QADCINT)
•
Test register (QADCTEST) for factory tests.
The global registers are always defined to be in supervisor-only data space. Refer to
for the
QADC64E_A address map and
for the QADC64E_B address map. See
“Supervisor/Unrestricted Address Space
” for access modes of these registers.
The remaining five registers in the control register block control the operation of the queuing mechanism,
and provide a means of monitoring the operation of the QADC64E.
•
Control register 0 (QACR0) contains hardware configuration information (
”)
•
Control register 1 (QACR1) is associated with queue 1 (
Section 13.3.6, “Control Register 1
”)
•
Control register 2 (QACR2) is associated with queue 2 (
Section 13.3.7, “Control Register 2
”)
Table 13-3. Multiplexed Analog Input Channels
Multiplexed Analog Input
Channels
ANw (AN[0])
0, 2, 4, 6, 8, 10, 12, 14
ANx (AN[1])
1, 3, 5, 7, 9, 11, 13, 15
ANy (AN[2])
16, 18, 20, 22, 24, 26, 28, 30
ANz (AN[3])
17, 19, 21, 23, 25, 27, 29, 31
Table 13-4. Analog Input Channels
Number of Analog Input Channels Available
Directly Con External Multiplexed = Total Channels
No External
MUX Chips
One External
MUX Chip
Two External
MUX Chips
Three External
MUX Chips
Four External
MUX Chips
16
20
27
34
41
Summary of Contents for MPC561
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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...
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Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
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