QADC64E Legacy Mode Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
13-15
register fields can be read or written but reserved fields read zero and writes have no effect. Typically, they
are written once when software initializes the QADC64E and are not changed afterwards.
NOTE
Details of how to calculate values for PSH, PSA, and PSL, as well as
examples, are given in
Section 13.5.5, “QADC64E Clock (QCLK)
13.3.6
Control Register 1 (QACR1)
Control register 1 is the mode control register for the operation of queue 1. The application software
defines the queue operating mode for the queue, and may enable a completion and/or pause interrupt. All
of the control register fields are read/write data. However, the SSE1 bit always reads as zero. Most of the
bits are typically written once when the software initializes the QADC64E, and not changed afterwards.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field EMUX
—
TRG
—
PSH
PSA
PSL
SRESET
0
00
0
000
0_0001
0
011
Addr
0x30 480A (QACR0_A); 0x30 4C0A (QACR0_B)
Figure 13-9. Control Register 0 (QACR0)
Table 13-9. QACR0 Bit Descriptions
Bits
Name
Description
0
EMUX
Externally multiplexed mode. The EMUX bit configures the QADC64E for externally multiplexed
mode, which affects the interpretation of the channel numbers and forces the MA[2:0] signals to
be outputs. See
for more information.
0 Internally multiplexed, 16 possible channels
1 Externally multiplexed, 41 possible channels
1:2
—
Reserved
3
TRG
Trigger assignment. TRG allows the software to assign the ETRIG[2:1] signals to queue 1 and
queue 2.
0 ETRIG1 triggers queue 1; ETRIG2 triggers queue 2
1 ETRIG1 triggers queue 2; ETRIG2 triggers queue 1
Refer to
Section 13.7.2, “External Trigger Input Signals
.”
4:6
—
Reserved
7:11
PSH
Prescaler clock high time. The PSH field selects the QCLK high time in the prescaler. PSH value
plus 1 represents the high time in IMB3 clocks
12
PSA
Note that this bit location is maintained for software compatibility with previous versions of the
QADC64E. It serves no functional benefit in the MPC561/MPC563 and is not operational.
13:15
PSL
Prescaler clock low time. The PSL field selects the QCLK low time in the prescaler. PSL value
plus 1 represents the low time in IMB3 clocks
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...
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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...