ATMEGA8-16PU datasheet(54/308 Pages) ATMEL

Il numero della parte	ATMEGA8-16PU

Spiegazioni elettronici	8-bit with 8K Bytes In-System Programmable Flash

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Produttore elettronici	ATMEL [ATMEL Corporation]

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54

2486T–AVR–05/08

ATmega8(L)

When reading back a software assigned pin value, a nop instruction must be inserted as indi-

cated in Figure 24. The out instruction sets the “SYNC LATCH” signal at the positive edge of the

clock. In this case, the delay t

pd through the synchronizer is 1 system clock period.

Figure 24. Synchronization when Reading a Software Assigned Pin Value

out PORTx, r16

nop

in r17, PINx

0xFF

0x00

0xFF

SYSTEM CLK

r16

INSTRUCTIONS

SYNC LATCH

PINxn

r17

t

pd

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