ATMEGA324A-PU Atmel, ATMEGA324A-PU Datasheet - Page 315
ATMEGA324A-PU
Manufacturer Part Number
ATMEGA324A-PU
Description
IC MCU AVR 32K 20MHZ 40PDIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA324A-PU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
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)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Controller Family/series
Atmega
No. Of I/o's
32
Eeprom Memory Size
1KB
Ram Memory Size
2KB
Cpu Speed
20MHz
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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26.10.2
26.10.3
8272A–AVR–01/10
AVR_RESET (0xC)
PROG_ENABLE (0x4)
Figure 26-13. State Machine Sequence for Changing the Instruction Word
The AVR specific public JTAG instruction for setting the AVR device in the Reset mode or taking
the device out from the Reset mode. The TAP controller is not reset by this instruction. The one
bit Reset Register is selected as Data Register. Note that the reset will be active as long as there
is a logic “one” in the Reset Chain. The output from this chain is not latched.
The active states are:
• Shift-DR: The Reset Register is shifted by the TCK input.
The AVR specific public JTAG instruction for enabling programming via the JTAG port. The 16-
bit Programming Enable Register is selected as Data Register. The active states are the
following:
• Shift-DR: The programming enable signature is shifted into the Data Register.
• Update-DR: The programming enable signature is compared to the correct value, and
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Programming mode is entered if the signature is valid.
1
0
Test-Logic-Reset
Run-Test/Idle
0
1
1
0
Select-DR Scan
Capture-DR
Update-DR
Pause-DR
Exit1-DR
Exit2-DR
Shift-DR
1
0
0
1
0
1
1
0
1
1
0
0
1
0
Select-IR Scan
Capture-IR
Update-IR
Pause-IR
Exit1-IR
Exit2-IR
Shift-IR
1
0
0
1
0
1
1
0
1
1
0
0
315
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