ATMEGA32A-AN Atmel, ATMEGA32A-AN Datasheet - Page 245
ATMEGA32A-AN
Manufacturer Part Number
ATMEGA32A-AN
Description
IC MCU AVR 32K FLASH 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA32A-MU.pdf
(353 pages)
Specifications of ATMEGA32A-AN
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Table 24-5.
Note:
8155C–AVR–02/11
Signal
Name
MUXEN_2
MUXEN_1
MUXEN_0
NEGSEL_2
NEGSEL_1
NEGSEL_0
PASSEN
PRECH
SCTEST
ST
VCCREN
Incorrect setting of the switches in
choices to the S&H circuitry on the negative input of the output comparator in
from either one ADC pin, Bandgap reference source, or Ground.
Boundary-scan Signals for the ADC (Continued)
Direction as Seen
from the ADC
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Description
Input Mux bit 2
Input Mux bit 1
Input Mux bit 0
Input Mux for negative input for
differential signal, bit 2
Input Mux for negative input for
differential signal, bit 1
Input Mux for negative input for
differential signal, bit 0
Enable pass-gate of gain stages.
Precharge output latch of
comparator. (Active low)
Switch-cap TEST enable. Output
from x10 gain stage send out to
Port Pin having ADC_4
Output of gain stages will settle
faster if this signal is high first two
ACLK periods after AMPEN goes
high.
Selects Vcc as the ACC reference
voltage.
Figure 24-10
will make signal contention and may damage the part. There are several input
Recommended
Input when Not
in Use
0
0
1
0
0
0
1
1
0
0
0
Figure
24-10. Make sure only one path is selected
Output Values when Recommended
Inputs are used, and CPU is not
Using the ADC
ATmega32A
0
0
1
0
0
0
1
1
0
0
0
245
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