AT80C51RD2 Atmel Corporation, AT80C51RD2 Datasheet - Page 64

• 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

17.2
T
T
Notes:
4113D–8051–01/09
A
A
Symbol
= 0°C to +70°C; V
= -40°C to +85°C; V
I
I
CCIDLE
V
R
V
V
CIO
CCOP
V
V
V
V
I
I
I
I
OL1
OH1
RST
PD
TL
IH1
OH
OL
IL
LI
IH
IL
DC Parameters for Standard Voltage (2)
1. Operating I
2. Idle I
3. Power-down I
4. Capacitance loading on Ports 0 and 2 may cause spurious noise pulses to be superimposed on the V
5. Typical are based on a limited number of samples and are not guaranteed. The values listed are at room temperature and
6. Under steady state (non-transient) conditions, I
7. For other values, please contact your sales office.
V
V
17-1).
V
17-3).
and 3. The noise is due to external bus capacitance discharging into the Port 0 and Port 2 pins when these pins make 1 to 0
transitions during bus operation. In the worst cases (capacitive loading 100pF), the noise pulse on the ALE line may exceed
0.45V with maxi V
5V.
Maximum I
Maximum I
Port 0: 26 mA
Ports 1, 2 and 3: 15 mA
Maximum total I
If I
than the listed test conditions.
Parameter
Input Low Voltage
Input High Voltage except XTAL1, RST
Input High Voltage, XTAL1, RST
Output Low Voltage, ports 1, 2, 3, 4 and 5
Output Low Voltage, port 0, ALE, PSEN
Output High Voltage, ports 1, 2, 3, 4 and 5
Output High Voltage, port 0, ALE, PSEN
Logical 0 Input Current ports 1, 2, 3, 4 and 5
Input Leakage Current
Logical 1 to 0 Transition Current, ports 1, 2, 3, 4
and 5
RST Pulldown Resistor
Capacitance of I/O Buffer
Power-down Current
Power Supply Current on normal mode
Power Supply Current on idle mode
IL
IH
IH
OL
= V
= V
= V
CC
exceeds the test condition, V
SS
CC
CC
is measured with all output pins disconnected; XTAL1 driven with T
+ 0.5V,
- 0.5V; XTAL2 N.C; Port 0 = V
- 0.5V; XTAL2 N.C.; EA = RST = Port 0 = V
SS
OL
OL
CC
SS
CC
= 0 V; V
per port pin: 10 mA
per 8-bit port:
is measured with all output pins disconnected; XTAL1 driven with T
OL
= 0 V; V
is measured with all output pins disconnected; EA = V
OL
for all output pins: 71 mA
peak 0.6V. A Schmitt Trigger use is not necessary.
CC
CC
= 2.7V to 5.5V; F = 10 to 40 MHz
= 2.7V to 5.5V; F = 10 to 40 MHz
OL
(6)
may exceed the related specification. Pins are not guaranteed to sink current greater
(6)
CC
; EA = RST = V
0.2 V
OL
0.7 V
0.9 V
0.9 V
must be externally limited as follows:
Min
-0.5
CC
50
+ 0.9
CC
CC
CC
CC
. I
SS
CC
(see
Typ
would be slightly higher if a crystal oscillator used (see
200
120
(5)
Figure
0.29 x Frequency (MHz) + 4
0.16 x Frequency (MHz) + 4
SS
, PORT 0 = V
17-2).
CLCH
0.2 V
V
V
CC
CC
, T
-650
Max
0.45
0.45
±10
250
150
-50
10
CC
CLCH
CHCL
+ 0.5
+ 0.5
- 0.1
CC
, T
= 5 ns, V
; XTAL2 NC.; RST = V
CHCL
= 5 ns (see Figure 17-4.),
AT80C51RD2
IL
= V
Unit
mA
mA
μA
μA
μA
kΩ
μA
pF
V
V
V
V
V
V
V
OL
SS
s of ALE and Ports 1
+ 0.5V,
Test Conditions
I
I
I
I
V
0.45V < V
V
Fc = 3 MHz
T
V
V
V
OL
OL
OH
OH
A
IN
IN
CC
CC
CC
= 25°C
= 0.8 mA
= 1.6 mA
= -10 μA
= -40 μA
= 0.45V
= 2.0V
=2.7V to 5.5V
= 5.5V
= 5.5V
SS
(see
IN
(1)
(2)
< V
(4)
(4)
Figure
Figure
CC
61
(3)