MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 423

• 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

13.9 Analog Subsystem
MPC555
USER’S MANUAL
The QADC64 analog subsystem includes a front-end analog multiplexer, a digital to
analog converter (DAC) array, a comparator, and a successive approximation register
(SAR).
The analog subsystem path runs from the input pins through the input multiplexing cir-
cuitry, into the DAC array, and through the analog comparator. The output of the com-
parator feeds into the SAR.
Figure 13-4
/
NOTES:
MPC556 QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE-64
No External
MUX Chips
1. When external multiplexing is used, three input channels become multiplexed address out-
puts, and for each external multiplexer chip, one input channel becomes a multiplexed ana-
log input.
16
shows a block diagram of the QADC64 analog submodule.
Directly Connected + External Multiplexed = Total Channels
One External
12 + 8 = 20
MUX Chip
Table 13-2 Analog Input Channels
Number of Analog Input Channels Available
Rev. 15 October 2000
Two External
11 + 16 = 27
MUX Chips
Three External
10 + 24 = 34
MUX Chips
1
Four External
MUX Chips
9 + 32 = 41
MOTOROLA
13-11