ATMEGA103L-4AC Atmel, ATMEGA103L-4AC Datasheet - Page 87

IC MCU 128K 4MHZ A/D LV 64TQFP

ATMEGA103L-4AC

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
Port A Schematics
Port B
0945I–AVR–02/07
pins are tri-stated when a reset condition becomes active, even if the clock is not
running.
Table 28. DDAn Effects on Port A Pins
Note:
Note that all port pins are synchronized. The synchronization latch is, however, not
shown in the figure.
Figure 53. Port A Schematic Diagrams (Pins PA0 - PA7)
Port B is an 8-bit bi-directional I/O port with internal pull-ups.
Three I/O memory address locations are allocated for Port B, one each for the Data
Register – PORTB, $18($38), Data Direction Register – DDRB, $17($37) and the Port B
Input Pins – PINB, $16($36). The Port B Input Pins address is read-only, while the Data
Register and the Data Direction Register are read/write.
All port pins have individually selectable pull-up resistors. The Port B output buffers can
sink 20 mA and thus drive LED displays directly. When pins PB0 to PB7 are used as
DDAn
0
0
1
1
n: 7,6...0, pin number
PORTAn
PAn
0
1
0
1
MOS
PULL-
UP
WP:
WD:
RL:
RP:
RD:
SRE:
A:
D:
W:
R:
n:
Output
Output
Input
Input
I/O
WRITE PORTA
WRITE DDRA
READ PORTA LATCH
READ PORTA PIN
READ DDRA
EXT. SRAM ENABLE
ADDRESS
DATA
WRITE
READ
0-7
Pull-up
Yes
No
No
No
Comment
Tri-state (high-Z)
PAn will source current if ext. pulled low.
Push-pull Zero Output
Push-pull One Output
RL
RP
ATmega103(L)
Q
Q
PORTAn
RESET
RESET
DDAn
WD
RD
WP
R
C
R
C
D
D
SRE
R
W
An
Dn
87

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