MC68181 Datasheet, PDF (68/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
Freescale Semiconductor, Inc.
Host-to-Decoder Packet Descriptions
RESET
Disables Itself
Initializes Checksum
Register to
Part ID Value
Initiates
Part ID Packet
Waits for SPI
Packet from Host
Y _{Checksum Packet?} N
Y
Enabled?
Disables Itself
N
Packet Data
N
Matches Checksum
Register Data?
Y
Enables Itself
Sets Checksum
Register to the
XOR of the Packet
Data Bits with
the Checksum
Register Bits
Figure B-4 FLEX chip IC Checksum Flow Chart
AA1232
Configuration Packet
The Configuration Packet defines a number of different configuration options for the
FLEX chip IC. Proper operation is not guaranteed if these settings are changed when
B-8
MC68181 Technical Data Sheet
MOTOROLA
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