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ATmega16U4 Datasheet(PDF) 78 Page - ATMEL Corporation

Part # ATmega16U4
Description  8-bit Microcontroller with 16/32K Bytes of ISP Flash and USB Controller
PDF  408 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega16U4 Datasheet(HTML) 78 Page - ATMEL Corporation

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78
7766D–AVR–01/09
ATmega16U4/ATmega32U4
Note:
1. When enabled, the 2-wire Serial Interface enables Slew-Rate controls on the output pins PD0
and PD1. This is not shown in this table. In addition, spike filters are connected between the
AIO outputs shown in the port figure and the digital logic of the TWI module.
Table 10-9.
Overriding Signals for Alternate Functions PD7..PD4
Signal Name
PD7/T0/
OC4D/ADC10
PD6/T1/
OC4D/ADC9
PD5/XCK1/CTS
PD4/ICP1/
ADC8
PUOE
0
0
0
0
PUOV
0
0
0
0
DDOE
0
0
XCK1 OUTPUT
ENABLE
0
DDOV
0
0
1
0
PVOE
0
0
XCK1 OUTPUT
ENABLE
0
PVOV
0
0
XCK1 OUTPUT
0
DIEOE
0
0
0
0
DIEOV
0
0
0
0
DI
T0 INPUT
T1 INPUT
XCK1 INPUT
ICP1 INPUT
AIO
–
–
–
–
Table 10-10. Overriding Signals for Alternate Functions in PD3.PD0
(1)
Signal Name
PD3/INT3/TXD1
PD2/INT2/RXD1
PD1/INT1/SDA
PD0/INT0/SCL/
OC0B
PUOE
TXEN1
RXEN1
TWEN
TWEN
PUOV
0
PORTD2 • PUD
PORTD1 • PUD
PORTD0 • PUD
DDOE
TXEN1
RXEN1
TWEN
TWEN
DDOV
1
0
SDA_OUT
SCL_OUT
PVOE
TXEN1
0
TWEN ENABLE
TWEN | OC0B
ENABLE
PVOV
TXD1
0
0
OC0B
DIEOE
INT3 ENABLE
INT2 ENABLE
INT1 ENABLE
INT0 ENABLE
DIEOV
1
1
1
1
DI
INT3 INPUT
INT2 INPUT/RXD1
INT1 INPUT
INT0 INPUT
AIO
–
–
SDA INPUT
SCL INPUT



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