at89c51re2-slsem ATMEL Corporation, at89c51re2-slsem Datasheet - Page 150

• Manufacturer Part Number: at89c51re2-slsem
• Description: At89c51re2 8-bit Flash Microcontroller
• Manufacturer: ATMEL Corporation

T
Notes:
7663B–8051–03/07
A
Symbol
= -40°C to +85°C; V
I
I
CCWRITE
t
I
CCIDLE
R
WRITE
CCOP
C
I
I
I
I
RST
PD
TL
IL
LI
IO
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 values are based on a limited number of samples and are not guaranteed. The values listed are at room temperature
6. Under steady state (non-transient) conditions, I
V
(see Figure 48).
0.5V; XTAL2 N.C; Port 0 = V
ure 50).
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 100 pF), the noise pulse on the ALE line may exceed
0.45V with maxi V
and 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
RST Pull-down Resistor
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
Capacitance of I/O Buffer
Power-down Current
Power Supply Current on normal mode
Power Supply Current on idle mode
Power Supply Current on flash write
Flash programming time
SS
OL
+ 0.5V, V
CC
exceeds the test condition, V
is measured with all output pins disconnected; XTAL1 driven with T
OL
OL
CC
SS
IH
CC
per port pin: 10 mA
per 8-bit port:
is measured with all output pins disconnected; XTAL1 driven with T
= 0V; V
= V
OL
is measured with all output pins disconnected; EA = V
OL
for all output pins: 71 mA
CC
peak 0.6V. A Schmitt Trigger use is not necessary.
- 0.5V; XTAL2 N.C.; EA = RST = Port 0 = V
CC
Figure 48. I
=2.7V to 5.5V; F = 0 to 60 MHz (Continued)
CC
; EA = RST = V
OL
CLOCK
SIGNAL
may exceed the related specification. Pins are not guaranteed to sink current greater
CC
(NC)
Test Condition, Active Mode
SS
V
OL
CC
(see Figure 49).
must be externally limited as follows:
Min
50
RST
XTAL2
XTAL1
V
SS
V
EA
CC
200
I
P0
Typ
CC
75
7
(5)
V
CC
CC
V
. I
CC
0.8 x Frequency (MHz) + 15
0.4 x Frequency (MHz) + 5
0.3 x Frequency (MHz) + 5
CC
CC
, PORT 0 = V
would be slightly higher if a crystal oscillator used
CLCH
, T
Max
-650
250
±10
150
All other pins are disconnected.
-50
10
10
CLCH
CHCL
, T
CC
= 5 ns, V
; XTAL2 NC.; RST = V
CHCL
= 5 ns (see Figure 51), V
IL
Unit
= V
mA
mA
mA
ms
kΩ
µA
µA
µA
pF
µA
OLS
SS
of ALE and Ports 1
Test Conditions
V
0.45V < V
V
F
T
2.7 < V
V
V
V
2.7 < V
+ 0.5V, V
A
IN
IN
C
CC
CC
CC
= 25°C
= 3 MHz
= 0.45V
= 2.0V
= 5.5V
= 5.5V
= 5.5V
CC <
CC <
SS
IN
IH
(see Fig-
(1)
(2)
5.5V
5.5V
< V
= V
CC
(3)
133
CC
IL
=
-