Rainbow-electronics ATmega128L Manuel d'utilisateur télécharger pdf (Page 291)

291

ATmega128(L)

2467B–09/01

Figure 141. Parallel Programming Timing, Loading Sequence with Timing

Requirements

Note: The timing requirements shown in Figure 140 (i.e. t

DVXH

, t

XHXL

, and t

XLDX

) also apply to

loading operation.

Figure 142. Parallel Programming Timing, Reading Sequence (Within the Same Page)

with Timing Requirements

Note: The timing requirements shown in Figure 140 (i.e. t

DVXH

, t

XHXL

, and t

XLDX

) also apply to

reading operation.

Table 127. Parallel Programming Characteristics, V

= 5 V ± 10%

Symbol Parameter Min Typ Max Units

Programming Enable Voltage 11.5 12.5 V

Programming Enable Current 250 µA

DVXH

Data and Control Valid before XTAL1 High 67 ns

XLXH

XTAL1 Low to XTAL1 High 200 ns

XHXL

XTAL1 Pulse Width High 150 ns

XLDX

Data and Control Hold after XTAL1 Low 67 ns

XLWL

XTAL1 Low to WR Low 0 ns

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)

BHDV

OLDV

XLOL

OHDZ

1 2 ... 286 287 288 289 290 291 292 293 294 295 296 ... 330 331

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