TS80C51RA2-VCA Atmel, TS80C51RA2-VCA Datasheet - Page 67

• Manufacturer Part Number: TS80C51RA2-VCA
• Description: IC MCU 8BIT 256BYTE 40MHZ 40-DIP
• Manufacturer: Atmel
• Series: 80Cr

Specifications of TS80C51RA2-VCA

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40/30MHz
• Connectivity: UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

11.5.5
Figure 11-7. External Data Memory Write Cycle
11.5.6
4188F–8051–01/08
External Data Memory Write Cycle
External Data Memory Read Cycle
PORT 0
PORT 2
PSEN
ALE
WR
Table 11-9.
OR SFR-P2
ADDRESS
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
WLWH
QVWX
QVWH
WHQX
RHDX
AVWL
WHLH
WHLH
RLRH
RLDV
RHDZ
AVDV
LLDV
LLWL
LLWL
RLAZ
AC Parameters for a Variable Clock: derating formula
Type
Max
Max
Max
Max
Max
Max
Max
Min
Min
Min
Min
Min
Min
Min
Min
Min
A0-A7
T
T
LLAX
AVWL
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
T + x
T - x
T - x
T - x
LLWL
x
x
ADDRESS A8-A15 OR SFR P2
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
QVWX
T
-M
20
20
25
20
40
60
25
25
25
15
15
10
15
15
0
0
QVWH
T
DATA OUT
WLWH
15
15
23
15
35
50
20
20
20
10
10
10
10
AT/TS8xC51Rx2
-V
0
8
0
T
WHLH
25
25
30
25
45
65
30
30
30
20
20
15
20
20
-L
0
0
T
WHQX
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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