ATMEGA103L-4AC Atmel, ATMEGA103L-4AC Datasheet - Page 109
ATMEGA103L-4AC
Manufacturer Part Number
ATMEGA103L-4AC
Description
IC MCU 128K 4MHZ A/D LV 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets
1.ATMEGA103-6AC.pdf
(141 pages)
2.ATMEGA103-6AC.pdf
(4 pages)
3.ATMEGA103L-4AC.pdf
(4 pages)
Specifications of ATMEGA103L-4AC
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
64-TQFP, 64-VQFP
For Use With
ATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Programming the EEPROM
0945I–AVR–02/07
Figure 74. Programming the Flash Waveforms (Continued)
The programming algorithm for the EEPROM data memory is as follows (refer to “Pro-
gramming the Flash” on page 107 for details on command, address and data loading):
1. A: Load Command “0001 0001”.
2. H: Load Address High Byte ($00 - $0F).
3. B: Load Address Low Byte ($00 - $FF).
4. E: Load Data Low Byte ($00 - $FF).
L: Write Data Low Byte.
1. Set BS to “0”. This selects low data.
2. Give WR a negative pulse. This starts programming of the data byte. RDY/BSY
3. Wait until RDY/BSY goes high to program the next byte.
(See Figure 75 for signal waveforms.)
The loaded command and address are retained in the device during programming. For
efficient programming, the following should be considered:
•
•
•
These considerations also apply to Flash, EEPROM and signature bytes reading.
goes low.
The command needs only be loaded once when writing or reading multiple memory
locations.
Address High Byte needs only be loaded before programming a new 256-word page
in the EEPROM.
Skip writing the data value $FF that is the contents of the entire EEPROM after a
chip erase.
RDY/BSY
RESET
PAGEL
XTAL1
DATA
XA1
XA0
BS1
BS2
WR
OE
+12V
DATA HIGH
ATmega103(L)
109
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