atmega103 ATMEL Corporation, atmega103 Datasheet - Page 121

• Manufacturer Part Number: atmega103
• Description: Atmega103 8-bit With 128k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Table 47. External Data Memory Characteristics, 2.7 - 3.6 Volts, No Wait State
Table 48. External Data Memory Characteristics, 2.7 - 3.6 Volts, 1 Cycle Wait State
Notes:
0945I–AVR–02/07
0
1
2
3a
3b
4
5
6
7
8
9
10
11
12
13
14
15
16
0
10
12
15
16
Symbol
1/t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Symbol
1/t
t
t
t
t
LHLL
AVLL
LLAX_ST
LLAX_LD
AVLLC
AVRL
AVWL
LLWL
LLRL
DVRH
RLDV
RHDX
RLRH
DVWL
WHDX
DVWH
WLWH
RLDV
RLRH
DVWH
WLWH
1. This assumes 50% clock duty cycle. The half period is actually the high time of the external clock, XTAL1.
2. This assumes 50% clock duty cycle. The half period is actually the low time of the external clock, XTAL1.
CLCL
CLCL
Parameter
Oscillator Frequency
ALE Pulse Width
Address Valid A to ALE Low
Address Hold after ALE Low,
ST/STD/STS Instructions
Address Hold after ALE Low,
LD/LDD/LDS Instructions
Address Valid C to ALE Low
Address Valid to RD Low
Address Valid to WR Low
ALE Low to WR Low
ALE Low to RD Low
Data Setup to RD High
Read Low to Data Valid
Data Hold after RD High
RD Pulse Width
Data Setup to WR Low
Data Hold after WR High
Data Valid to WR High
WR Pulse Width
Parameter
Oscillator Frequency
Read Low to Data Valid
RD Pulse Width
Data Valid to WR High
WR Pulse Width
125.0
205.0
325.0
230.0
105.0
115.0
230.0
230.0
100.0
480.0
480.0
350.0
65.0
75.0
15.0
60.0
90.0
Min
Min
0.0
0.0
4 MHz Oscillator
4 MHz Oscillator
270.0
145.0
210.0
460.0
Max
Max
1.5 t
0.5 t
0.5 t
0.5 t
1.5 t
0.5 t
0.5 t
0.5 t
1.0 t
1.0 t
1.0 t
1.0 t
2.0 t
2.0 t
0.5 t
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
115.0
15.0
Min
Min
0.0
0.0
0.0
0.0
CLCL
Variable Oscillator
Variable Oscillator
- 60.0
- 50.0
- 65.0
- 65.0
- 20.0
- 35.0
- 25.0
- 25.0
- 45.0
- 20.0
- 20.0
- 20.0
- 20.0
- 20.0
(2)
(1)
(1)
(1)
(1)
(2)
(1)
(2)
(2)
ATmega103(L)
0.5 t
1.0 t
1.0 t
2.0 t
CLCL
CLCL
CLCL
CLCL
Max
Max
4.0
4.0
+ 20.0
+ 20.0
- 40.0
- 40.0
(2)
MHz
MHz
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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