at89c5131 ATMEL Corporation, at89c5131 Datasheet - Page 156

• Manufacturer Part Number: at89c5131
• Description: 8-bit Flash Microcontroller With Full Speed Usb Device At89c5131
• Manufacturer: ATMEL Corporation

Notes:
154
Symbol
V
PFDM
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. Typicals 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
AT89C5131
V
V
70.).
0.5V; XTAL2 N.C; Port 0 = V
ure 72.). In addition, the WDT must be inactive and the POF flag must be set.
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
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
Power Fail Low Level Threshold
Power fail hysteresis V
SS
IH
OL
= V
+ 0.5V,
CC
exceeds the test condition, V
CC
is measured with all output pins disconnected; XTAL1 driven with T
- 0.5V; XTAL2 N.C.; EA = RST = Port 0 = V
OL
OL
CC
CC
per port pin: 10 mA
per 8-bit port:
is measured with all output pins disconnected; XTAL1 driven with T
OL
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.
PFDP
- V
Figure 70. I
PFDM
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
OL
(see Figure 71).
must be externally limited as follows:
Min
0.15
2.2
RST
XTAL2
XTAL1
V
CC
SS
. I
CC
V
EA
CC
would be slightly higher if a crystal oscillator used (see Figure
I
P0
CC
Typ
V
CC
V
(5)
CC
CC
, PORT 0 = V
CLCH
, T
All other pins are disconnected.
Max
CLCH
CHCL
, T
CC
= 5 ns, V
CHCL
; XTAL2 NC.; RST = V
Unit
= 5 ns (see Figure 73.), V
V
V
IL
= V
Test Conditions
OLS
SS
of ALE and Ports 1
+ 0.5V, V
4136C–USB–04/05
SS
IH
(see Fig-
= V
CC
IL
=
-