AT90S8515-8PC datasheet(5/112 Pages) ATMEL

Part #	AT90S8515-8PC

Description	8-bit Microcontroller with 8K Bytes In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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5

AT90S8515

0841G–09/01

current if the pull-up resistors are activated. The Port D pins are tri-stated when a reset

condition becomes active, even if the clock is not active.

Port D also serves the functions of various special features of the AT90S8515 as listed

on page 73.

RESET

Reset input. A low level on this pin for more than 50 ns will generate a reset, even if the

clock is not running. Shorter pulses are not guaranteed to generate a reset.

XTAL1

Input to the inverting oscillator amplifier and input to the internal clock operating circuit.

XTAL2

Output from the inverting oscillator amplifier.

ICP

ICP is the input pin for the Timer/Counter1 Input Capture function.

OC1B

OC1B is the output pin for the Timer/Counter1 Output CompareB function.

ALE

ALE is the Address Latch Enable used when the External Memory is enabled. The ALE

strobe is used to latch the low-order address (8 bits) into an address latch during the first

access cycle, and the AD0 - 7 pins are used for data during the second access cycle.

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