ATMEGA32A-ANR Atmel, ATMEGA32A-ANR Datasheet - Page 247
![IC MCU AVR 32K FLASH 44TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA32A-ANR
Manufacturer Part Number
ATMEGA32A-ANR
Description
IC MCU AVR 32K FLASH 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA32A-MU.pdf
(353 pages)
Specifications of ATMEGA32A-ANR
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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24.6
8155C–AVR–02/11
ATmega32A Boundary-scan Order
Table 24-6.
Using this algorithm, the timing constraint on the HOLD signal constrains the TCK clock fre-
quency. As the algorithm keeps HOLD high for five steps, the TCK clock frequency has to be at
least five times the number of scan bits divided by the maximum hold time, t
Table 24-7
selected as data path. Bit 0 is the LSB; the first bit scanned in, and the first bit scanned out. The
scan order follows the pin-out order as far as possible. Therefore, the bits of Port A is scanned in
the opposite bit order of the other ports. Exceptions from the rules are the Scan chains for the
analog circuits, which constitute the most significant bits of the scan chain regardless of which
physical pin they are connected to. In
corresponds to FF1, and PXn. Pullup_enable corresponds to FF2. Bit 2, 3, 4, and 5 of Port C is
not in the scan chain, since these pins constitute the TAP pins when the JTAG is enabled.
Table 24-7.
Step
Bit Number
140
139
138
137
10
11
1
2
3
4
5
6
7
8
9
Actions
SAMPLE_
PRELOAD
EXTEST
Verify the
COMP bit
scanned
out to be 0
Verify the
COMP bit
scanned
out to be 1
shows the scan order between TDI and TDO when the Boundary-scan chain is
Algorithm for Using the ADC
ATmega32A Boundary-scan Order
Signal Name
AC_IDLE
ACO
ACME
ACBG
ADCEN
1
1
1
1
1
1
1
1
1
1
1
DAC
0x200
0x200
0x200
0x123
0x123
0x200
0x200
0x200
0x143
0x143
0x200
Figure
MUXEN
0x08
0x08
0x08
0x08
0x08
0x08
0x08
0x08
0x08
0x08
0x08
24-3, PXn. Data corresponds to FF0, PXn. Control
Module
Comparator
HOLD
1
0
1
1
1
1
0
1
1
1
1
PRECH
1
1
1
1
0
1
1
1
1
0
1
PA3.
Data
0
0
0
0
0
0
0
0
0
0
0
ATmega32A
hold,max
PA3.
Control
0
0
0
0
0
0
0
0
0
0
0
.
PA3.
Pullup_
Enable
0
0
0
0
0
0
0
0
0
0
0
247
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