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ATMEGA128A データシート(PDF) 74 Page - ATMEL Corporation

部品番号 ATMEGA128A
部品情報  8-bit Microcontroller with 128Kbytes
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メーカー  ATMEL [ATMEL Corporation]
ホームページ  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA128A データシート(HTML) 74 Page - ATMEL Corporation

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ATmega 128A [DATASHEET]
Atmel-8151I-8-bit-AVR-ATmega128A_Datasheet-08/2014
Note:
1. See “Output Compare Modulator (OCM1C2)” on page 157 for details. OC1C does not exist in ATmega103 com-
patibility mode.
12.3.3
Alternate Functions of Port C
In ATmega103 compatibility mode, Port C is output only. The ATmega128A is by default shipped in compatibility
mode. Thus, if the parts are not programmed before they are put on the PCB, PORTC will be output during first
power up, and until the ATmega103 compatibility mode is disabled. The Port C has an alternate function as the
address high byte for the External Memory Interface.
Table 12-6.
Overriding Signals for Alternate Functions in PB7:PB4
Signal Name
PB7/OC2/OC1C
PB6/OC1B
PB5/OC1A
PB4/OC0
PUOE
0
0
0
0
PUOV
0
0
0
0
DDOE
0
0
0
0
DDOV
0
0
0
0
PVOE
OC2/OC1C ENABLE(1)
OC1B ENABLE
OC1A ENABLE
OC0 ENABLE
PVOV
OC2/OC1C(1)
OC1B
OC1A
OC0B
DIEOE
0
0
0
0
DIEOV
0
0
0
0
DI
–
–
–
–
AIO
–
–
–
–
Table 12-7.
Overriding Signals for Alternate Functions in PB3:PB0
Signal
Name
PB3/MISO
PB2/MOSI
PB1/SCK
PB0/SS
PUOE
SPE • MSTR
SPE • MSTR
SPE • MSTR
SPE • MSTR
PUOV
PORTB3 • PUD
PORTB2 • PUD
PORTB1 • PUD
PORTB0 • PUD
DDOE
SPE • MSTR
SPE • MSTR
SPE • MSTR
SPE • MSTR
DDOV
0
0
0
0
PVOE
SPE • MSTR
SPE • MSTR
SPE • MSTR
0
PVOV
SPI SLAVE OUTPUT
SPI MSTR OUTPUT
SCK OUTPUT
0
DIEOE
0
0
0
0
DIEOV
0
0
0
0
DI
SPI MSTR INPUT
SPI SLAVE INPUT
SCK INPUT
SPI SS
AIO
–
–
–
–


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