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M32171F4VFP Datasheet(Fiches technique) 27 Page - Mitsubishi Electric Semiconductor

Numéro de pièce M32171F4VFP
Description  SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER    
Télécharger  37 Pages
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Fabricant  MITSUBISHI [Mitsubishi Electric Semiconductor]
Site Internet  http://www.mitsubishichips.com
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Mitsubishi Microcomputers
27
SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER
2001-5-14 Rev.1.0
32171 Group
Built-in Two Independent A-D Converters
The microcomputer contains two 16-channel converters with
10-bit resolution (A-D0 converter and A-D1 converter). In
addition to single conversion on each channel, continuous
A-D conversion on a combined group of 4, 8, and 16 chan-
nels is possible. The A-D converted value can be read out in
either 10 bits or 8 bits.
Table 13 Outline of the A-D Converters
Item
Content
Analog input
16 channels
A-D conversion methodSuccessive approximation method.
Resolution
10 bits (Conversion results can be read out in either 10 or 8 bits.)
Absolute accuracy
Normal rate mode
+2 LSB
(Conditions: Ta = -40 ~ +125
°C,
Double rate mode
+2 LSB
AVCC0 = VREF0 = 5.12V) (Note 1)
Conversion mode
A-D conversion mode,comparator mode
Operation mode
Single mode, scan mode
Scan mode
Single -shot scan mode, continuous scan mode.
Conversion start trigger
Software start
Started by setting A-D conversion start bit to 1.
Hardware start
A-D0 converter started by MJT output event bus 3.
Conversion rate
During single mode
Normal
299
× 1/ f (BCLK)
f(BCLK) : Internal peripheral clock
(Shortest time )
Double speed173
× 1/ f (BCLK)
(Note 2)
operating frequency
During comparator mode
Normal
47
× 1/ f (BCLK)
(Shortest time )
Double speed29
× 1/ f (BCLK)
Interrupt request generation
When A-D conversion is finished, when comparate operation is finished, when single-shot
scan is finished, or when one cycle of continuous scan is finished.
DMA transfer request generation
When A-D conversion is finished, when comparate operation is finished, when single-shot
scan is finished, or when one cycle of continuous scan is finished.
Note 1: The rated value of conversion accuracy here is that of the microcomputer's own as a single unit which can be exhibited when the
microcomputer is used in an environment where it may not be affected by the power supply wiring or noise on the board.
Note 2: When input clock (XIN) = 10 MHz, f(BCLK) = 20 MHz.
In addition to ordinary A-D conversion, the converters sup-
port comparator mode in which the set value and A-D con-
verted value are compared to determine which is larger or
smaller than the other.
When A-D conversion is finished, the converters can generated
a DMA transfer request, as well as an interrupt.
The A-D converters are interfaced using a dedicated power
supply to allow for connections to the peripheral circuits op-
erating with 5V or 3.3V.




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