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AT90S4433 Datasheet(PDF) 74 Page - ATMEL Corporation

Part No. AT90S4433
Description  8-Bit AVR Microcontroller with 4K Bytes of In-System Programmable Flash
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90S4433 Datasheet(HTML) 74 Page - ATMEL Corporation

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AT90S/LS4433
1042H–AVR–04/03
controlled by DDB2. When the pin is forced to be an input, the pull-up can still be con-
trolled by the PORTB2 bit. See the description of the SPI port for further details.
• OC1 – Port B, Bit 1
OC1, Output Compare Match output: PB1 pin can serve as an external output for the
Timer/Counter1 Output Compare. The pin has to be configured as an output (DDB1 set
[one]) to serve this function. See the timer description on how to enable this function.
The OC1 pin is also the output pin for the PWM mode timer function.
• ICP – Port B, Bit 0
ICP, Input Capture Pin: PB0 pin can serve as an external input for the Timer/Counter1
input capture. The pin has to be configured as an input (DDB0 cleared [zero]) to serve
this function. See the timer description on how to enable this function.
Figure 50. Port B Schematic Diagram (Pin PB0)
D
D
Q
Q
RESET
RESET
C
C
WD
WP
RD
MOS
PULL-
UP
PB0
R
R
WP:
WD:
RL:
RP:
RD:
ACIC:
ACO:
WRITE PORTB
WRITE DDRB
READ PORTB LATCH
READ PORTB PIN
READ DDRB
COMPARATOR IC ENABLE
COMPARATOR OUTPUT
DDB6
PORTB0
NOISE CANCELER
EDGE SELECT
ICF1
ICNC1
ICES1
0
1
ACIC
ACO
RL
RP


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