ATMEGA161L-4AI Atmel, ATMEGA161L-4AI Datasheet - Page 94

• Manufacturer Part Number: ATMEGA161L-4AI
• Description: IC AVR MCU 16K LV 4MZ IND 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA161L-4AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 35
• 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): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: ATMEGA161L4AI

Port B Schematics
94
ATmega161(L)
Note that all port pins are synchronized. The synchronization latches are, however, not
shown in the figures.
Figure 56. Port B Schematic Diagram (Pins PB0 and PB1)
PBn
WP:
WD:
RL:
RP:
RD:
n:
x:
0,1
0,2
WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
CSn2 CSn1 CSn0
PORTBn
DDBn
COMx0
COMx1
COMP. MATCH x
PWMx
FOCx
1228D–AVR–02/07