mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 129

• Manufacturer Part Number: mc9s08ac32
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

8.1.2
This section defines the CRC operation in run, wait, and stop modes.
8.1.3
8.2
There are no CRC signals that connect off chip.
Freescale Semiconductor
Figure 8-2
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Run Mode - This is the basic mode of operation.
Wait Mode - The CRC module is operational.
Stop 1 and 2 Modes- The CRC module is not functional in these modes and will be put into its reset
state upon recovery from stop.
Stop 3 Mode - In this mode, the CRC module will go into a low power standby state. Any CRC
calculations in progress will stop and resume after the CPU goes into run mode.
External Signal Description
Modes of Operation
Block Diagram
provides a block diagram of the CRC module.
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15
Figure 8-2. Cyclic Redundancy Check (CRC) Module Block Diagram
CRC High Register (CRCH)
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MC9S08AC60 Series Data Sheet, Rev. 2
12
16-bit CRC Generator Circuit
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8
......
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5
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Chapter 8 Cyclic Redundancy Check (S08CRCV1)
CRC Low Register (CRCL)
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3
2
1
0
0
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