MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 456

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC555CME

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC555
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: MPC555
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MPC555
USER’S MANUAL
BQ2
00
63
Figure 13-12
To prepare the QADC64 for a scan sequence, the software writes to the CCW table to
specify the desired channel conversions. The software also establishes the criteria for
initiating the queue execution by programming the queue operating mode. The queue
operating mode determines what type of trigger event causes queue execution to be-
gin. “Trigger event” refers to any of the ways to cause the QADC64 to begin executing
the CCWs in a queue or sub-queue. An external trigger is only one of the possible trig-
ger events.
A scan sequence may be initiated by the following:
LSB
6
P
CONVERSION COMMAND WORD
CHAN = CHANNEL NUMBER AND END-OF-QUEUE CODE
BYP = BYPASS BUFFER AMPLIFIER
• A software command
IST = INPUT SAMPLE TIME
BYP
P = PAUSE AFTER CONVERSION UNTIL NEXT TRIGGER
7
/
END OF Queue 1
END OF Queue 2
MPC556 QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE-64
BEGIN Queue 1
BEGIN Queue 2
(CCW) TABLE
10-BIT CONVERSION COMMAND
8
IST
9
WORD FORMAT
Figure 13-12 QADC64 Conversion Queue Operation
illustrates the operation of the queue structure.
10
11
CHAN
12
13
SAMPLE, HOLD, AND
CHANNEL SELECT,
A/D CONVERSION
14
Rev. 15 October 2000
15
MSB
S = SIGN BIT
MSB
MSB
MSB
0
0
0
0
S
1
1
1
0
RIGHT JUSTIFIED, UNSIGNED RESULT
LEFT JUSTIFIED, UNSIGNED RESULT
2
2
2
0
LEFT JUSTIFIED, SIGNED RESULT
10-BIT RESULT, READABLE IN
3
RESULT
3
3
0
RESULT
THREE 16-BIT FORMATS
4
4
RESULT WORD TABLE
4
0
5
5
5
0
6
6
6
7
7
7
8
8
8
9
9
9
RESULT
0
0
10
10
10
0
0
11 12 13 14
11 12 13 14
11 12 13 14
0
0
MOTOROLA
0
0
0
0
LSB
LSB
LSB
0
0
15
15
15
13-44
QADC64 C
00
63