Rainbow-electronics AT90SO4 Bedienungsanleitung PDF herunterladen (Seite 9)

AT90SO4

6579A–SMS–29Jan10

Output Low Voltage - I/O 0..1

Output Low Voltage - MISO, MOSI

5V, I

= 1mA

3V, I

= 1mA

0.08*V

0.15*V

Output High Voltage - I/O 0..1

Output High Voltage - MISO, MOSI

5V, 3V, I

= 1mA

0.7*Vcc

Vcc

I/O

Pin Pull-up I/O0, RST, I/O1, MISO,

MOSI

220 KOhm

Table 3. AC Characteristics (2.7V - 5.50V range; T= -25°C to +85°C)

Symbol Parameter Condition Min. Typ. Max. Units

CLK

External Clock Frequency 1 5 MHz

VFO

Variable Frequency Oscillator

(1)

Expected value at 25°C

Clock Jitter not enabled

5V, 3V

28 31 34 MHz

VFO

Average

Average Variable Frequency

Oscillator

(2)

Expected value at 25°C

Clock Jitter enabled

5V, 3V

28 MHz

EEPROM

EEPROM Write Time (erase+write) 1.6 2 2.4 ms

I/O Output Rise Time (HRD Mode)

out

=30pF

pullup

=20kOhm

100 ns

I/O Output Fall Time

out

=30pF

pullup

=20kOhm

100 ns

1. Please refer to Application Note “How to estimate a performance of a running code “ TPR0231X for the

dependence on temperature, clock jitter and clock dividers.

Table 4. Security Characteristics (2.7V - 5.50V range; T= -25°C to +85°C)

Symbol Parameter Condition Min. Typ. Max. Units

MAX

Voltage Monitor: High Level

Detection

5.5 V

MIN

Voltage Monitor: Low Level

Detection

Chip trimmed to operate at 5V,

2.7

MAX

External Frequency Monitor:

High Level Detection

Duty cycle = 40% to 60%

Running on External Clock

5 MHz

MIN

External Frequency Monitor: Low

Level Detection

Duty cycle = 40% to 60%

Running on External Clock

1 MHz

MON

Max

Temperature Monitor: High Level

Detection

85 °C

MON

Min

Temperature Monitor: Low Level

Detection

-25 °C

Table 2. DC Characteristics (2.7V - 5.50V range; T= -25°C to +85°C)

Symbol Parameter Condition Min. Typ. Max. Units

1 2 3 4 5 6 7 8 9 10 11 12 13

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