ATMEGA164A-PU Atmel, ATMEGA164A-PU Datasheet - Page 304

• 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

26.7.5
8272A–AVR–01/10
Programming the EEPROM
Figure 26-3. Programming the Flash Waveforms
Note:
The EEPROM is organized in pages, see
EEPROM, the program data is latched into a page buffer. This allows one page of data to be
programmed simultaneously. The programming algorithm for the EEPROM data memory is as
follows (refer to
Data loading):
1. A: Load Command “0001 0001”.
2. G: Load Address High Byte (0x00 - 0xFF).
3. B: Load Address Low Byte (0x00 - 0xFF).
4. C: Load Data (0x00 - 0xFF).
5. E: Latch data (give PAGEL a positive pulse).
K: Repeat 3 through 5 until the entire buffer is filled.
L: Program EEPROM page
1. Set BS2, BS1 to “00”.
2. Give WR a negative pulse. This starts programming of the EEPROM page. RDY/BSY
3. Wait until to RDY/BSY goes high before programming the next page (See
164A/164PA/324A/324PA/644A/644PA/1284/1284P
goes low.
signal waveforms).
RESET +12V
RDY/BSY
PAGEL
XTAL1
DATA
1. “XX” is don’t care. The letters refer to the programming description above.
XA1
XA0
BS1
BS2
WR
OE
0x10
A
”Programming the Flash” on page 302
ADDR. LOW
B
DATA LOW
C
DATA HIGH
D
XX
E
ADDR. LOW
B
Table 26-8 on page
DATA LOW
C
(1)
F
DATA HIGH
D
for details on Command, Address and
XX
E
ADDR. HIGH
G
299. When programming the
ADDR. EXT.H
H
I
XX
Figure 26-4
for
304