MC68376BAMFT20 Freescale Semiconductor, MC68376BAMFT20 Datasheet - Page 205

• Manufacturer Part Number: MC68376BAMFT20
• Manufacturer: Freescale Semiconductor

Specifications of MC68376BAMFT20

• Cpu Family: 68K/M683xx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 20MHz
• Interface Type: QSPI/SCI
• Program Memory Type: ROM
• Program Memory Size: 8KB
• Total Internal Ram Size: 7.5KB
• # I/os (max): 18
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Operating Supply Voltage (min): 4.75V
• On-chip Adc: 16-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 160
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

MC68336/376
USER’S MANUAL
• External trigger rising or falling edge continuous-scan mode
• Periodic timer continuous-scan mode
— This mode keeps the result registers updated more frequently than any of the
— This mode may be chosen for either queue, but is normally used only with
— The QADC provides external trigger pins for both queues. When this mode is
— In addition to the previous modes, queue 2 can also be programmed for the
— The QADC includes a dedicated periodic/interval timer for initiating a scan
— When this mode is selected, the timer begins counting. After the programmed
— The periodic timer generates a trigger event whenever the time interval
— If the queue completion interrupt is enabled when using this mode, software
other queue operating modes. Software can always read the result table to get
the latest converted value for each channel. The channels scanned are kept
up to date by the QADC without software involvement.
queue 2. When the software initiated continuous-scan mode is chosen for
queue 1, that queue operates continuously and queue 2, being lower in prior-
ity, never gets executed. The short interval of time between a queue 1 pause
and the internally generated trigger event, or between a queue 1 completion
and the subsequent trigger event is not sufficient to allow queue 2 execution
to begin.
selected, a transition on the associated external trigger pin initiates queue ex-
ecution. The external trigger is programmable, so that queue execution can
begin on either a rising or a falling edge. Each CCW is read and the indicated
conversions are performed until an end-of-queue condition is encountered.
When the next external trigger edge is detected, queue execution begins
again automatically. Software initialization is not needed between trigger
events.
periodic timer continuous-scan mode, where a scan is initiated at a selectable
time interval using the on-chip periodic/interval timer. The queue operating
mode for queue 2 is selected by the MQ2 field in QACR2.
sequence for queue 2 only. A programmable timer interval can be selected
ranging from 2
interval elapses, the timer generated trigger event starts the queue. The timer
is then reloaded and begins counting again. Meanwhile, the QADC automati-
cally performs the conversions in the queue until an end-of-queue condition or
a pause is encountered. When a pause is encountered, the QADC waits for
the periodic interval to expire again, then continues with the queue. When an
end-of-queue is encountered, the next trigger event causes queue execution
to begin again with the first CCW in queue 2.
elapses. The trigger event may cause queue execution to continue following
a pause or queue completion, or may be considered a trigger overrun. As with
all continuous-scan queue operating modes, software action is not needed be-
tween trigger events.
can read the analog results that have just been collected. Software can use
this interrupt to obtain non-analog inputs as well, as part of a periodic look at
all inputs.
QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE
7
to 2
17
times the QCLK period in binary multiples.
MOTOROLA
8-23