Rainbow-electronics ATmega8HVD Manuel d'utilisateur télécharger pdf (Page 143)

143

8052B–AVR–09/08

ATmega4HVD/8HVD

Notes: 1. All Electrical Characteristics contained in this data sheet are based on initial characterization of actual silicon. These values

are preliminary values.

2. TBD

26.2 Oscillator Characteristics

Notes: 1. Not tested in production.

2. Relevant if regulatoris operated in Force mode.

Voltage

Regulator

Regulated Output Voltage, VREG

(Linear regulation mode)

VFET = 3.0 2.0 2.2 2.4 V

Regulator Output Voltage, VREG

(Force mode)

VFET -

DROP

FORCE

(2)

Operating Voltage, VFET

Active mode, EEPROM writing 2.3 6.0 V

Active mode, no EEPROM writing 2.1 6.0 V

Regulator Force mode level

FORCE

)

Rising edge 2.50 2.7 V

Falling edge 2.35 2.55 V

Regulator Force level hysteresis 150

Regulator drop in Force mode

(VFET - VREG)

VFET = 2.2V, I

load

= 1 mA 50

Table 26-1. Electrical Characteristics

(1)

, T

= -20°C to 85°C, VFET = 2.4 to 4.2V (unless otherwise noted) (Continued)

Parameter Condition Min Typ Max Unit

Table 2. Oscillator Characteristics, T

= -20°C to 85°C, V

= 2.2V (unless otherwise noted)

Parameter Condition Min Typ Max Unit

Slow RC

Oscillator

Frequency 91 131 171 kHz

Frequency Prediction Error

(1)

Frequency drift as function of V

(1)(2)

2.1 ≤ V

≤ 2.7 4

ULP RC

Oscillator

Frequency 89 128 167 kHz

Fast RC

Oscillator

After initial calibration 1.9 2.0 2.1 MHz

FOSCCAL frequency step size 0.5 1 2 %

Frequency drift as function of V

(1)(2)

2.1 ≤ V

≤ 2.7, T

= 25°C 0.5 %

1 2 ... 138 139 140 141 142 143 144 145 146 147 148 ... 167 168

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