atmega3250v-8auatmega325v-8ai ATMEL Corporation, atmega3250v-8auatmega325v-8ai Datasheet - Page 278

• Manufacturer Part Number: atmega3250v-8auatmega325v-8ai
• Description: Atmega3250 8-bit Microcontroller With In-system Programmable Flash
• Manufacturer: ATMEL Corporation

278
ATmega325/3250/645/6450
Figure 27-9. Parallel Programming Timing, Reading Sequence (within the Same Page) with
Note:
Table 27-12. Parallel Programming Characteristics, V
Symbol
V
I
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
PP
DVXH
XLXH
XHXL
XLDX
XLWL
XLPH
PLXH
BVPH
PHPL
PLBX
WLBX
PLWL
BVWL
WLWH
WLRL
WLRH
WLRH_CE
XLOL
PP
XTAL1
DATA
BS1
XA0
XA1
OE
1. The timing requirements shown in
ing operation.
Parameter
Programming Enable Voltage
Programming Enable Current
Data and Control Valid before XTAL1 High
XTAL1 Low to XTAL1 High
XTAL1 Pulse Width High
Data and Control Hold after XTAL1 Low
XTAL1 Low to WR Low
XTAL1 Low to PAGEL high
PAGEL low to XTAL1 high
BS1 Valid before PAGEL High
PAGEL Pulse Width High
BS1 Hold after PAGEL Low
BS2/1 Hold after WR Low
PAGEL Low to WR Low
BS1 Valid to WR Low
WR Pulse Width Low
WR Low to RDY/BSY Low
WR Low to RDY/BSY High
WR Low to RDY/BSY High for Chip Erase
XTAL1 Low to OE Low
Timing Requirements
ADDR0 (Low Byte)
LOAD ADDRESS
(LOW BYTE)
t
XLOL
t
OLDV
(1)
(1)
(LOW BYTE)
DATA (Low Byte)
READ DATA
Figure 27-7
(2)
t
BVDV
(i.e., t
CC
= 5V ± 10%
DVXH
(HIGH BYTE)
11.5
Min
READ DATA
200
150
150
150
150
3.7
7.5
67
67
67
67
67
67
67
DATA (High Byte)
0
0
0
0
, t
XHXL
Typ
, and t
t
OHDZ
Max
12.5
250
XLDX
4.5
1
9
LOAD ADDRESS
(LOW BYTE)
) also apply to read-
ADDR1 (Low Byte)
Units
ms
ms
μA
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
μs
ns
2570L–AVR–08/07
V