MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 390
MCF5272VF66
Manufacturer Part Number
MCF5272VF66
Description
Manufacturer
Freescale
Datasheet
1.MCF5272VF66.pdf
(544 pages)
Specifications of MCF5272VF66
Family Name
MCF5xxx
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
66MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
3.3V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
196
Package Type
MA-BGA
Lead Free Status / RoHS Status
Not Compliant
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UART Modules
16.5.6
The software flowchart,
16.5.6.1
Figure 16-31
16-30
•
•
•
UART module initialization—These routines consist of SINIT and CHCHK (sheets 1 and 2).
Before SINIT is called at system initialization, the calling routine allocates 2 words on the system
stack. On return to the calling routine, SINIT passes UART status data on the stack. If SINIT finds
no errors, the transmitter and receiver are enabled. SINIT calls CHCHK to perform the checks.
When called, SINIT places the UART in local loop-back mode and checks for the following errors:
— Transmitter never ready
— Receiver never ready
— Parity error
— Incorrect character received
I/O driver routine—This routine (sheets 4 and 5) consists of INCH, the terminal input character
routine which gets a character from the receiver, and OUTCH, which sends a character to the
transmitter.
Interrupt handling—Consists of SIRQ (sheet 4), which is executed after the UART module
generates an interrupt caused by a change-in-break (beginning of a break). SIRQ then clears the
interrupt source, waits for the next change-in-break interrupt (end of break), clears the interrupt
source again, then returns from exception processing to the system monitor.
Programming
UART Module Initialization Sequence
shows the UART module initialization sequence.
UART module registers can be accessed by word or byte operations, but
only data byte D[7:0] is valid.
Figure 16-31. UART Mode Programming Flowchart (Sheet 1 of 5)
MCF5272 ColdFire
Figure
16-31, consists of the following:
®
Integrated Microprocessor User’s Manual, Rev. 3
NOTE
Freescale Semiconductor
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