ATMEGA164A-PU Atmel, ATMEGA164A-PU Datasheet - Page 276

IC MCU AVR 16K 20MHZ 40PDIP

ATMEGA164A-PU

Manufacturer Part Number
ATMEGA164A-PU
Description
IC MCU AVR 16K 20MHZ 40PDIP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA164A-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
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K 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
512Byte
Ram Memory Size
1KB
Cpu Speed
20MHz
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
24.8
24.8.1
24.8.2
8272A–AVR–01/10
Register Description
MCUCR – MCU Control Register
MCUSR – MCU Status Register
The MCU Control Register contains control bits for general MCU functions.
Note:
• Bits 7 – JTD: JTAG Interface Disable
When this bit is zero, the JTAG interface is enabled if the JTAGEN Fuse is programmed. If this
bit is one, the JTAG interface is disabled. In order to avoid unintentional disabling or enabling of
the JTAG interface, a timed sequence must be followed when changing this bit: The application
software must write this bit to the desired value twice within four cycles to change its value. Note
that this bit must not be altered when using the On-chip Debug system.
The MCU Status Register provides information on which reset source caused an MCU reset.
• Bit 4 – JTRF: JTAG Reset Flag
This bit is set if a reset is being caused by a logic one in the JTAG Reset Register selected by
the JTAG instruction AVR_RESET. This bit is reset by a Power-on Reset, or by writing a logic
zero to the flag.
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Bit
0x35 (0x55)
Read/Write
Initial Value
Bit
0x34 (0x54)
Read/Write
Initial Value
1. Only available in the ATmega164PA/324PA/644PA/1284P.
JTD
R/W
7
0
R
7
0
BODS
R
6
0
R
6
0
(1)
BODSE
R
5
0
R
5
0
(1)
PUD
JTRF
R/W
R/W
4
0
4
WDRF
R/W
R
3
0
3
See Bit Description
BORF
R/W
R
2
0
2
IVSEL
EXTRF
R/W
R/W
1
0
1
IVCE
PORF
R/W
R/W
0
0
0
MCUCR
MCUSR
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