atmega161-4pi ATMEL Corporation, atmega161-4pi Datasheet - Page 96

• Manufacturer Part Number: atmega161-4pi
• Description: 8-bit Microcontroller With 16k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

96
ATmega161(L)
Figure 59. Port B Schematic Diagram (Pin PB4)
Figure 60. Port B Schematic Diagram (Pin PB5)
PB4
PB5
WP:
WD:
RL:
RP:
RD:
SPE:
MSTR
WP:
WD:
RL:
RP:
RD:
MSTR:
SPE:
MOS
PULL-
UP
MOS
PULL-
UP
WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
SPI ENABLE
MASTER SELECT
WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
SPI MASTER ENABLE
SPI ENABLE
RL
RP
RL
RP
Q
Q
PORTB4
Q
RESET
RESET
Q
DDB4
PORTB5
WD
WP
RESET
RESET
RD
DDB5
C
C
WD
WP
RD
R
C
R
C
D
D
D
D
MSTR
SPE
SPI MASTER
OUT
SPI SLAVE
IN
MSTR
SPE
SPI SS
1228D–AVR–02/07