MC68F375
QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE-64
MOTOROLA
REFERENCE MANUAL
Rev. 25 June 03
5-39
Table 5-12 QACR1 Bit Settings
Bit(s)
Name
Description
15
CIE1
Queue 1 completion interrupt enable. CIE1 enables completion interrupts for queue 1. The inter-
rupt request is generated when the conversion is complete for the last CCW in queue 1.
0 = Queue 1 completion interrupts disabled.
1 = Generate an interrupt request after completing the last CCW in queue 1.
14
PIE1
Queue 1 pause interrupt enable. PIE1 enables pause interrupts for queue 1. The interrupt
request is generated when the conversion is complete for a CCW that has the pause bit set.
0 = Queue 1 pause interrupts disabled.
1 = Generate an interrupt request after completing a CCW in queue 1 which has the pause bit set.
13
SSE1
Queue 1 single-scan enable. SSE1 enables a single-scan of queue 1 after a trigger event occurs.
The SSE1 bit may be set to a one during the same write cycle that sets the MQ1 bits for the sin-
gle-scan queue operating mode. The single-scan enable bit can be written as a one or a zero,
but is always read as a zero.
The SSE1 bit allows a trigger event to initiate queue execution for any single-scan operation on
queue 1. The QADC64 clears SSE1 when the single-scan is complete.
12:8
MQ1
Queue 1 operating mode. The MQ1 field selects the queue operating mode for queue 1. Table 5-13 shows the different queue 1 operating modes.
7:0
—
Reserved
Table 5-13 Queue 1 Operating Modes
MQ1
Operating Modes
00000
Disabled mode, conversions do not occur
00001
Software triggered single-scan mode (started with SSE1)
00010
External trigger rising edge single-scan mode
00011
External trigger falling edge single-scan mode
00100
Interval timer single-scan mode: time = QCLK period x 27
00101
Interval timer single-scan mode: time = QCLK period x 28
00110
Interval timer single-scan mode: time = QCLK period x 29
00111
Interval timer single-scan mode: time = QCLK period x 210
01000
Interval timer single-scan mode: time = QCLK period x 211
01001
Interval timer single-scan mode: time = QCLK period x 212
01010
Interval timer single-scan mode: time = QCLK period x 213
01011
Interval timer single-scan mode: time = QCLK period x 214
01100
Interval timer single-scan mode: time = QCLK period x 215
01101
Interval timer single-scan mode: time = QCLK period x 216
01110
Interval timer single-scan mode: time = QCLK period x 217
01111
External gated single-scan mode (started with SSE1)
10000
Reserved mode
10001
Software triggered continuous-scan mode
10010
External trigger rising edge continuous-scan mode
10011
External trigger falling edge continuous-scan mode
10100
Periodic timer continuous-scan mode: time = QCLK period x 27
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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