Manual

ATmega603/103
101
Table 42. Parallel Programming Characteristics
T
A
= 25
°
C ± 10%, V
CC
=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
V
PP
Programming Enable Voltage 11.5 12.5 V
I
PP
Programming Enable Current 250 µA
t
DVXH
Data and Control Valid before XTAL1 High 67 ns
t
XHXL
XTAL1 Pulse Width High 67 ns
t
XLDX
Data and Control Hold after XTAL1 Low 67 ns
t
XLWL
XTAL1 Low to WR Low 67 ns
t
BVXH
BS1 Valid before XTAL1 High 67 ns
t
PHPL
PAGEL Pulse Width High 67 ns
t
PLBX
BS1 Hold after PAGEL Low 67 ns
t
PLWL
PAGEL Low to WR Low 67 ns
t
BVWL
BS1 Valid to WR Low 67 ns
t
RHBX
BS1 Hold after RDY/BSY High 67 ns
t
WLWH
WR Pulse Width Low
(1)
67 ns
t
WHRL
WR High to RDY/BSY Low
(2)
20 ns
t
WLRH
WR Low to RDY/BSY High
(2)
0.5 0.7 0.9 ms
t
XLOL
XTAL1 Low to OE Low 67 ns
t
OLDV
OE Low to DATA Valid 20 ns
t
OHDZ
OE High to DATA Tri-stated 20 ns
t
WLWH_CE
WR Pulse Width Low for Chip Erase 5 10 15 ms
t
WLWH_PFB
WR Pulse Width Low for Progr. the Fuse Bits 1.0 1.5 1.8 ms