ATMEGA103L-4AC Atmel, ATMEGA103L-4AC Datasheet - Page 108

• Manufacturer Part Number: ATMEGA103L-4AC
• Description: IC MCU 128K 4MHZ A/D LV 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

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

108
ATmega103(L)
E: Load Data High Byte.
1. Set BS1 to “1”. This selects high data.
2. Set XA1, XA0 to “01”. This enables data loading.
3. Set DATA = Data High Byte ($00 - $FF).
4. Give XTAL1 a positive pulse. This loads the data High Byte.
F: Latch Data High Byte.
1. Give PAGEL a positive pulse. This latches the data High Byte.
G: Repeat B through F 128 times to fill the page buffer.
H: Load Address High Byte.
1. Set XA1, XA0 to “00”. This enables address loading.
2. Set BS1 to “1”. This selects high address.
3. Set DATA = Address High Byte ($00 - $FF).
4. Give XTAL1 a positive pulse. This loads the address High Byte.
I: Program Page.
1. Give WR a negative pulse. This starts programming of the entire page of data.
2. Wait until RDY/BSY goes high.
(See Figure 74 for signal waveforms.)
J: End Page Programming.
1. Set XA1, XA0 to “10”. This enables command loading.
2. Set DATA = “0000 0000”. This is the command for No Operation.
3. Give XTAL1 a positive pulse. This loads the command and the internal write sig-
K: Repeat A through J 512 times or until all data has been programmed.
Figure 73. Programming the Flash Waveforms
RDY/BSY goes low.
nals are reset.
RDY/BSY
RESET
PAGEL
XTAL1
DATA
XA1
XA2
BS1
BS2
WR
OE
+12V
$10
ADDR. LOW
ADDR. HIGH
DAT
A LOW
0945I–AVR–02/07