Rainbow Electronics ATmega8HVD - Manual (Page 145)

145
8052B–AVR–09/08
ATmega4HVD/8HVD
26.5 General I/O Lines Characteristics
Notes: 1. Applicable for all except PC0/PC1.
2. “Min” means the lowest value where the pin is guaranteed to be read as high.
3. “Max” means the highest value where the pin is guaranteed to be read as low.
4. Although each I/O port can sink more than the test conditions (1 mA at V
CC
= 2.2V) under steady state conditions (non-tran-
sient), the following must be observed:
- The sum of all IOL should not exceed 20 mA.
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test condition.
5. Although each I/O port can source more than the test conditions (1 mA at V
CC
= 2.2V) under steady state conditions (non-
transient), the following must be observed:
- The sum of all IOH should not exceed 2 mA.
Notes: 1. Not tested in production.
2. C
b
= capacitance of one bus line in pF.
Table 26-4. T
A
= -20
°
C to 85
°
C, VFET = 2.1V to 4.2V (unless otherwise noted)
Symbol Parameter Condition Min. Typ. Max. Units
V
IL
(1)
Input Low Voltage, Except
RESET pin
V
CC
= 2.2V -0.5 0.2V
CC
V
V
IL1
Input Low Voltage RESET
pin
V
CC
= 2.2V -0.5 0.2V
CC
V
IH
(1)
Input High Voltage,
Except RESET pin
V
CC
= 2.2V 0.7V
CC
(2) V
CC
+ 0.5 (3) V
V
IH1
Input High Voltage,
RESET pin
V
CC
= 2.2V 0.9V
CC
(2) V
CC
+ 0.5 (3) V
V
OL
Output Low Voltage I
OL
= 1mA, V
CC
= 2.2V 0.2 V
V
OH
Output High Voltage I
OH
= -1mA, V
CC
= 2.2V 2.0 V
I
IL
Input Leakage
Current I/O Pin V
CC
= 2.2V, pin low
(absolute value)
1 µA
I
IH
Input Leakage
Current I/O Pin V
CC
= 2.2V, pin high
(absolute value)
1 µA
R
RST
Reset Pull-up Resistor 30 60 k
Ω
R
PU
I/O Pin Pull-up Resistor 20 50 k
Ω
Table 26-5. PC0/PC1 Characteristics, T
A
= -20°C to 85°C, VFET = 2.4 to 4.2V (unless otherwise noted)
Symbol Parameter Condition Min Max Units
V
IL
Input Low-voltage -0.5 0.3VCC V
V
IH
Input High-voltage 0.6VCC 5 V
V
OL
Output Low-voltage 350 µA sink current 0 0.4 V
t
r
(1) Rise Time 300 ns
t
of
(1) Output Fall Time from V
IHmin
to V
ILmax
C
b
< 400 pF (2) 250 ns
t
SP
(1) Spikes Suppressed by Input Filter 0 TBD ns
I
IH
Input Leakage Current V
IH
= 4.2V 5 µA
C
i
(1) Capacitance 10 pF