MCF5282CVM66 Freescale, MCF5282CVM66 Datasheet - Page 112
MCF5282CVM66
Manufacturer Part Number
MCF5282CVM66
Description
Manufacturer
Freescale
Datasheet
1.MCF5282CVM66.pdf
(766 pages)
Specifications of MCF5282CVM66
Cpu Family
MCF528x
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
66MHz
Interface Type
CAN/I2C/QSPI/UART
Total Internal Ram Size
64KB
# I/os (max)
150
Number Of Timers - General Purpose
12
Operating Supply Voltage (typ)
3.3V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
256
Package Type
MA-BGA
Program Memory Type
Flash
Program Memory Size
512KB
Lead Free Status / RoHS Status
Compliant
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Static RAM (SRAM)
The following loop initializes the entire SRAM to zero
lea.l
move.l
SRAM_INIT_LOOP:
clr.l
subq.l
bne.b
5.3.4
As noted previously, depending on the configuration defined by the RAMBAR, instruction fetch and
operand read accesses may be sent to the SRAM and cache simultaneously. If the access is mapped to the
SRAM module, it sources the read data and the unified cache access is discarded. If the SRAM is used
only for data operands, asserting the ASn bits associated with instruction fetches can decrease power
dissipation. Additionally, if the SRAM contains only instructions, masking operand accesses can reduce
power dissipation.
5-4
Power Management
Table 5-2
RAMBASE,A0
#16384,D0
(A0)+)
#1,D0
SRAM_INIT_LOOP
Data Contained in SRAM
Both Code And Data
shows some examples of typical RAMBAR settings.
Table 5-2. Typical RAMBAR Setting Examples
Code Only
Data Only
;load pointer to SRAM
;load loop counter into D0
;clear 4 bytes of SRAM
;decrement loop counter
;if done, then exit; else continue looping
RAMBAR[7:0]
0x2B
0x35
0x21
Freescale Semiconductor
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