Rainbow-electronics ATmega103L Manual do Utilizador descarregar pdf (Página 101)

ATmega603/103

101

Table 42. Parallel Programming Characteristics

= 25

C ± 10%, V

=5V ± 10%

Notes: 1. Use t

WLWH_CE

for Chip Erase and t

WLWH_PFB

for Programming the Fuse Bits.

2. If t

WLWH

is held longer than t

WLRH

, no RDY/BSY pulse will be seen.

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

XHXL

XTAL1 Pulse Width High 67 ns

XLDX

Data and Control Hold after XTAL1 Low 67 ns

XLWL

XTAL1 Low to WR Low 67 ns

BVXH

BS1 Valid before XTAL1 High 67 ns

PHPL

PAGEL Pulse Width High 67 ns

PLBX

BS1 Hold after PAGEL Low 67 ns

PLWL

PAGEL Low to WR Low 67 ns

BVWL

BS1 Valid to WR Low 67 ns

RHBX

BS1 Hold after RDY/BSY High 67 ns

WLWH

WR Pulse Width Low

(1)

67 ns

WHRL

WR High to RDY/BSY Low

(2)

20 ns

WLRH

WR Low to RDY/BSY High

(2)

0.5 0.7 0.9 ms

XLOL

XTAL1 Low to OE Low 67 ns

OLDV

OE Low to DATA Valid 20 ns

OHDZ

OE High to DATA Tri-stated 20 ns

WLWH_CE

WR Pulse Width Low for Chip Erase 5 10 15 ms

WLWH_PFB

WR Pulse Width Low for Progr. the Fuse Bits 1.0 1.5 1.8 ms

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 125 126

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