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ATMEGA16-16MC Datasheet(PDF) 50 Page - ATMEL Corporation

Part No. ATMEGA16-16MC
Description  8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash
Download  315 Pages
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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ATMEGA16-16MC Datasheet(HTML) 50 Page - ATMEL Corporation

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ATmega16(L)
2466E–AVR–10/02
succeeding positive clock edge. As indicated by the two arrows t
pd,max and tpd,min, a
single signal transition on the pin will be delayed between ½ and 1½ system clock
period depending upon the time of assertion.
When reading back a software assigned pin value, a nop instruction must be inserted as
indicated in Figure 25. 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 one system
clock period.
Figure 25. Synchronization when Reading a Software Assigned Pin Value
nop
in r17, PINx
0xFF
0x00
0xFF
tpd
out PORTx, r16
SYSTEM CLK
r16
INSTRUCTIONS
SYNC LATCH
PINxn
r17


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