ATMEGA64-16AI datasheet(31/393 Pages) ATMEL

Part #	ATMEGA64-16AI

Description	8-bit Microcontroller with 64K Bytes In-System Programmable Flash

PDF	393 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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31 / 393 page

ATmega64(L)

2490L–AVR–10/06

Figure 15. External Data Memory Cycles with SRWn1 = 1 and SRWn0 = 0

(1)

Note:

1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper

sector) or SRW00 (lower sector).

The ALE pulse in period T6 is only present if the next instruction accesses the RAM

(internal or external).

Figure 16. External Data Memory Cycles with SRWn1 = 1 and SRWn0 = 1

(1)

Note:

1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper

sector) or SRW00 (lower sector).

The ALE pulse in period T7 is only present if the next instruction accesses the RAM

(internal or external).

ALE

A15:8

Address

Prev. Addr.

DA7:0

Address

Data

Prev. Data

DA7:0 (XMBK = 0)

Data

Prev. Data

Address

Data

Prev. Data

Address

DA7:0 (XMBK = 1)

System Clock (CLKCPU)

ALE

A15:8

Address

Prev. Addr.

DA7:0

Address

Data

Prev. Data

DA7:0 (XMBK = 0)

Data

Prev. Data

Address

Data

Prev. Data

Address

DA7:0 (XMBK = 1)

System Clock (CLKCPU)

ATMEGA64-16AI Datasheet(PDF) 31 Page - ATMEL Corporation

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