Datasheet

310
8021G–AVR–03/11
ATmega329P/3290P
Notes: 1. t
WLRH
is valid for the Write Flash, Write EEPROM, Write Fuse bits and Write Lock bits
commands.
2. t
WLRH_CE
is valid for the Chip Erase command.
Figure 27-7. Parallel Programming Timing, Including some General Timing Requirements
t
BVPH
BS1 Valid before PAGEL High 67 ns
t
PHPL
PAGEL Pulse Width High 150 ns
t
PLBX
BS1 Hold after PAGEL Low 67 ns
t
WLBX
BS2/1 Hold after WR Low 67 ns
t
PLWL
PAGEL Low to WR Low 67 ns
t
BVWL
BS1 Valid to WR Low 67 ns
t
WLWH
WR Pulse Width Low 150 ns
t
WLRL
WR Low to RDY/BSY Low 0 1 μs
t
WLRH
WR Low to RDY/BSY High
(1)
3.7 4.5 ms
t
WLRH_CE
WR Low to RDY/BSY High for Chip Erase
(2)
7.5 9 ms
t
XLOL
XTAL1 Low to OE Low 0 ns
t
BVDV
BS1 Valid to DATA valid 0 250 ns
t
OLDV
OE Low to DATA Valid 250 ns
t
OHDZ
OE High to DATA Tri-stated 250 ns
Table 27-15. Parallel Programming Characteristics, V
CC
= 5V ± 10% (Continued)
Symbol Parameter Min Typ Max Units
Data & Contol
(DATA, XA0/1, BS1, BS2)
XTAL1
t
XHXL
t
WLWH
t
DVXH
t
XLDX
t
PLWL
t
WLRH
WR
RDY/BSY
PAGEL
t
PHPL
t
PLBX
t
BVPH
t
XLWL
t
WLBX
t
BVWL
WLRL