ATMEGA164A-PU Atmel, ATMEGA164A-PU Datasheet - Page 298

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

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

26.2.1
26.3
26.4
26.5
Table 26-7.
8272A–AVR–01/10
ATmega164A/ATmega164PA
ATmega324A/ATmega324PA
ATmega644A/ATmega644PA
ATmega1284/ATmega1284P
Signature Bytes
Calibration Byte
Page Size
Latching of Fuses
Device
No. of Words in a Page and No. of Pages in the Flash
The fuse values are latched when the device enters programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
the EESAVE Fuse which will take effect once it is programmed. The fuses are also latched on
Power-up in Normal mode.
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both serial and parallel mode, also when the device is locked. The three
bytes reside in a separate address space.
For the ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P the signature bytes are
given in
Table 26-6.
The ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P has a byte calibration value
for the internal RC Oscillator. This byte resides in the high byte of address 0x000 in the signa-
ture address space. During reset, this byte is automatically written into the OSCCAL Register to
ensure correct frequency of the calibrated RC Oscillator.
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Part
ATmega164A
ATmega164PA
ATmega324A
ATmega324PA
ATmega644A
ATmega644PA
ATmega1284
ATmega1284P
64K words (128 Kbytes)
8K words (16 Kbytes)
16K words (32 Kbytes)
32K words (64 Kbytes)
Table
Flash Size
26-6.
Device and JTAG ID
0x000
0x1E
0x1E
0x1E
0x1E
0x1E
0x1E
0x1E
0x1E
Signature Bytes Address
Page Size
128 words
128 words
64 words
64 words
0x001
0x94
0x94
0x95
0x95
0x96
0x96
0x97
0x97
0x002
PCWORD
0x0F
0x0A
0x15
0x11
0x09
0x0A
0x06
0x05
PC[5:0]
PC[5:0]
PC[6:0]
PC[6:0]
Part Number
No. of Pages
940A
940A
960A
960A
9511
9511
9705
9705
128
256
256
512
JTAG
PCPAGE
PC[12:6]
PC[13:6]
PC[14:6]
PC[15:7]
Manufacture ID
0x1F
0x1F
0x1F
0x1F
0x1F
0x1F
0x1F
0x1F
PCMSB
12
13
14
15
298