ATMEGA640 datasheet(337/436 Pages) MICROCHIP

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337

ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]

DS40002211A

30.7.15

Parallel Programming Characteristics

Figure 30-7. Parallel Programming Timing, Including some General Timing Requirements

Figure 30-8. Parallel Programming Timing, Loading Sequence with Timing Requirements(1)

Note:

1. The timing requirements shown in Figure 30-7 (that is, tDVXH, tXHXL, and tXLDX) also apply to loading operation.

Figure 30-9. Parallel Programming Timing, Reading Sequence (within the Same Page) with Timing

Requirements(1)

Note:

1. The timing requirements shown in Figure 30-7 (that is, tDVXH, tXHXL, and tXLDX) also apply to reading operation.

Data & Contol

(DATA, XA0/1, BS1, BS2)

XTAL1

XHXL

WLWH

DVXH

XLDX

PLWL

WLRH

RDY/BSY

PAGEL

PHPL

PLBX

BVPH

XLWL

WLBX

BVWL

WLRL

XTAL1

PAGEL

PLXH

XLXH

XLPH

ADDR0 (Low Byte)

DATA (Low Byte)

DATA (High Byte)

ADDR1 (Low Byte)

DATA

BS1

XA0

XA1

LOAD ADDRESS

(LOW BYTE)

LOAD DATA

(LOW BYTE)

LOAD DATA

(HIGH BYTE)

LOAD DATA

LOAD ADDRESS

(LOW BYTE)

XTAL1

ADDR0 (Low Byte)

DATA (Low Byte)

DATA (High Byte)

ADDR1 (Low Byte)

DATA

BS1

XA0

XA1

LOAD ADDRESS

(LOW BYTE)

READ DATA

(LOW BYTE)

READ DATA

(HIGH BYTE)

LOAD ADDRESS

(LOW BYTE)

BVDV

OLDV

XLOL

OHDZ

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