AT80C51RD2 Atmel Corporation, AT80C51RD2 Datasheet - Page 70

• Manufacturer Part Number: AT80C51RD2
• Manufacturer: Atmel Corporation

Specifications of AT80C51RD2

• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 1.25
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Watchdog: Yes

17.3.5
4113D–8051–01/09
External Data Memory Write Cycle
PORT 0
PORT 2
PSEN
ALE
WR
OR SFR-P2
ADDRESS
A0-A7
T
T
LLAX
AVWL
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
LLWL
WLWH
QVWX
QVWH
WHQX
RHDX
AVWL
WHLH
WHLH
RLRH
RLDV
RHDZ
AVDV
LLDV
LLWL
LLWL
RLAZ
ADDRESS A8 - A15 OR SFR P2
Type
Max
Max
Max
Max
Max
Max
Max
Min
Min
Min
Min
Min
Min
Min
Min
Min
T
QVWX
Standard
3 T + x
6 T - x
6 T - x
5 T - x
2 T - x
8 T - x
9 T - x
3 T - x
4 T - x
7 T - x
Clock
T + x
T - x
T - x
T - x
x
x
T
QVWH
T
DATA OUT
WLWH
X2 Clock
1.5 T + x
0.5 T + x
2.5 T - x
4.5 T - x
1.5 T - x
0.5 T - x
3.5 T - x
0.5 T - x
0.5 T - x
3 T - x
3 T - x
2 T - x
4T -x
T - x
x
x
T
WHLH
X parameter for -
M range
AT80C51RD2
25
25
30
25
45
65
30
30
30
20
20
15
20
20
0
0
T
WHQX
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
67