MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 529

• 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

14.9.7 Example SCI Transmit for 25 Data Bytes
MPC555
USER’S MANUAL
3
Figure 14-19
1
QTSZ=1000 (9 Data Frames)
QTPNT
QTSZ=1111 (16 Data Frames)
QTPNT
0000
0111
1000
1111
Transmit Queue Enabled
0000
0111
1000
1111
QBHE Interrupt Received
(Wrap Occurred)
/
MPC556
Write SCTQ[8]
Clear QBHE
Load QPEND with QTSZ
Clear QTWE
Reset QTPNT
SCTQ[7]
Figure 14-19 Queue Transmit Example for 25 Data Frames
SCTQ[0]
SCTQ[8]
SCTQ[15]
SCTQ[0]
SCTQ[7]
SCTQ[8]
SCTQ[15]
below is an example of a transmission of 25 data frames.
QUEUED SERIAL MULTI-CHANNEL MODULE
QPEND
1000
0001
0000
QPEND
1111
1000
0111
0000
Rev. 15 October 2000
2
QTSZ=1111 (16 Data Frames)
QTPNT
4
QTSZ=1000 (9 Data Frames)
QTPNT
0000
0111
1000
1001
1111
0000
0111
1000
1111
QTHE Interrupt Received
QTHE Interrupt Received
Write QTSZ = 8 (16 + 9 = 25)
Write SCTQ [0:7] for 8 More Data Frames
Set QTWE
Clear QTHE
SCTQ[7]
SCTQ[0]
SCTQ[8]
SCTQ[15]
SCTQ[0]
SCTQ[7]
SCTQ[8]
SCTQ[15]
QPEND
QPEND
1000
0001
0000
1111
1111
1000
0111
0000
Data to be Transferred
Available Register Space
MOTOROLA
14-67