ATMEGA103L-4AI Atmel, ATMEGA103L-4AI Datasheet - Page 99
ATMEGA103L-4AI
Manufacturer Part Number
ATMEGA103L-4AI
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-4AI
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
-40°C ~ 85°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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Port E Data Register – PORTE
Port E Data Direction Register
– DDRE
Port E Input Pins Address –
PINE
Port E as General Digital I/O
Alternate Functions of Port E
0945I–AVR–02/07
The Port E Input Pins address (PINE) is not a register; this address enables access to
the physical value on each Port E pin. When reading PORTE, the Port E Data Latch is
read and when reading PINE, the logical values present on the pins are read.
PEn, general I/O pin: The DDEn bit in the DDRE Register selects the direction of this
pin. If DDEn is set (one), PEn is configured as an output pin. If DDEn is cleared (zero),
PEn is configured as an input pin. If PEn is set (one) when configured as an input pin,
the MOS pull-up resistor is activated. To switch the pull-up resistor off, the PEn has to
be cleared (zero) or the pin has to be configured as an output pin.The port pins are tri-
stated when a reset condition becomes active, even if the clock is not running.
Table 34. DDEn Bits on Port E Pins
Note:
The alternate pin functions of Port E are:
• PDI/RXD – Port E, Bit 0
PDI, Serial Programming Data Input. During Serial Program downloading, this pin is
used as data input line for the ATmega103(L).
RXD, UART Receive Pin. Receive Data (Data input pin for the UART). When the UART
Receiver is enabled, this pin is configured as an input regardless of the value of DDRD0.
When the UART forces this pin to be an input, a logical “1” in PORTD0 will turn on the
internal pull-up.
• PDO/TXD – Port E, Bit 1
PDO, Serial Programming Data Output. During Serial Program downloading, this pin is
used as data output line for the ATmega103(L).
Bit
$03 ($23)
Read/Write
Initial Value
Bit
$02 ($22)
Read/Write
Initial Value
Bit
$01 ($21)
Read/Write
Initial Value
DDEn
0
0
1
1
n: 7,6...0, pin number
PORTEn
PORTE7
PINE7
DDE7
R/W
R/W
N/A
R
7
0
7
0
7
0
1
0
1
PORTE6
PINE6
DDE6
R/W
R/W
N/A
R
6
0
6
0
6
Output
Output
Input
Input
I/O
PORTE5
PINE5
DDE5
R/W
R/W
N/A
R
5
0
5
0
5
Pull-up
Yes
No
No
No
PORTE4
PINE4
DDE4
R/W
R/W
N/A
R
4
0
4
0
4
Comment
Tri-state (high-Z)
PDn will source current if ext. pulled low.
Push-pull Zero Output
Push-pull One Output
PORTE3
PINE3
DDE3
R/W
R/W
N/A
3
0
3
0
3
R
PORTE2
PINE2
DDE2
R/W
R/W
N/A
2
0
2
0
2
R
ATmega103(L)
PORTE1
PINE1
DDE1
R/W
R/W
N/A
R
1
0
1
0
1
PORTE0
PINE0
DDE0
R/W
R/W
N/A
R
0
0
0
0
0
DDRE
PORTE
PINE
99
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