Rainbow-electronics ATmega103L Manual do Utilizador descarregar pdf (Página 82)

ATmega603/103

Figure 60. Port B Schematic Diagram (Pin PB7)

Port C

PORT C is an 8-bit Output port.

The Port C pins have alternate functions related to the optional external data SRAM. When using the device with external

SRAM, Port C outputs the high-order address byte during accesses to external data memory. When a reset condition

becomes active, the port pins are not tristated, but the pins will assume their initial value after two stable clock cycles.

The Port C Data Register - PORTC

Bit 76543210

$15 ($35) PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 PORTC

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Initial value00000000

DATA BUS

RESET

MOS

PULL-

PB7

WP:

WD:

RL:

RP:

RD:

WRITE PORTB

WRITE DDRB

READ PORTB LATCH

READ PORTB PIN

READ DDRB

DDB7

PORTB7

COMP. MATCH 2

COM20

COM21

OUTPUT

MODE SELECT

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 125 126

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Rainbow-electronics ATmega103L Manual do Utilizador Página 82