MCF5270CAB100 Freescale Semiconductor, MCF5270CAB100 Datasheet - Page 283
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MCF5270CAB100
Manufacturer Part Number
MCF5270CAB100
Description
MCU V2 COLDFIRE 64K SRAM 160-QFP
Manufacturer
Freescale Semiconductor
Series
MCF527xr
Specifications of MCF5270CAB100
Core Processor
Coldfire V2
Core Size
32-Bit
Speed
100MHz
Connectivity
EBI/EMI, Ethernet, I²C, SPI, UART/USART
Peripherals
DMA, WDT
Number Of I /o
39
Program Memory Type
ROMless
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
1.4 V ~ 1.6 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
160-QFP
Processor Series
MCF527x
Core
ColdFire V2
3rd Party Development Tools
JLINK-CF-BDM26, EWCF
Development Tools By Supplier
NNDK-MOD5272-KIT, NNDK-MOD5270-KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCF5270CAB100
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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14.4.4.2 Auto-Alignment
Auto-alignment allows block transfers to occur at the optimal size based on the address, byte
count, and programmed size. To use this feature, DCRn[AA] must be set. The source is
auto-aligned if DCRn[SSIZE] indicates a transfer size larger than DCRn[DSIZE]. Source
alignment takes precedence over the destination when the source and destination sizes are equal.
Otherwise, the destination is auto-aligned. The address register chosen for alignment increments
regardless of the increment value. Configuration error checking is performed on registers not
chosen for alignment.
If BCRn is greater than 16, the address determines transfer size. Bytes, words, or longwords are
transferred until the address is aligned to the programmed size boundary, at which time accesses
begin using the programmed size.
If BCRn is less than 16 at the start of a transfer, the number of bytes remaining dictates transfer
size. For example, AA = 1, SARn = 0x0001, BCRn = 0x00F0, SSIZE = 00 (longword), and DSIZE
= 01 (byte). Because SSIZE > DSIZE, the source is auto-aligned. Error checking is performed on
destination registers. The access sequence is as follows:
Freescale Semiconductor
1. Read byte from 0x0001—write 1 byte, increment SARn.
2. Read word from 0x0002—write 2 bytes, increment SARn.
3. Read longword from 0x0004—write 4 bytes, increment SARn.
4. Repeat longwords until SARn = 0x00F0.
5. Read byte from 0x00F0—write byte, increment SARn.
A[31:0], SIZ[1:0]
OE, BE/BWE
CSx, AS
DREQ
D[31:0]
CLKIN
R/W
TIP
TA
TS
n
0
Figure 14-11. Single-Address DMA Transfer
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MCF5271 Reference Manual, Rev. 2
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Functional Description
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14-19
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