ST7262 datasheet(101/132 Pages) STMICROELECTRONICS

部件名	ST7262

功能描述	LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS, FLASH OR ROM MEMORY, LVD, WDG, 10-BIT ADC, 2 TIMERS, SCI, SPI

PDF	132 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

101 / 132 page

ST7262

101/132

OPERATING CONDITIONS (Cont’d)

Figure 55. fCPU Versus VDD for low voltage devices

12.3.2 Operating Conditions with Low Voltage Detector (LVD)

Subject to general operating conditions for VDD, fCPU, and TA. Refer to Figure 15 on page 21.

Notes:

1. Not tested, guaranteed by design.

2. Not tested in production, guaranteed by characterization.

3. The VDD rise time rate condition is needed to insure a correct device power-on and LVD reset. Not tested in production.

fCPU [MHz]

SUPPLY VOLTAGE [V]

2.5

3.0

3.5

4.5

5.5

FUNCTIONALITY

NOT GUARANTEED

IN THIS AREA

FUNCTIONALITY

GUARANTEED

IN THIS AREA

(UNLESS OTHERWISE

SPECIFIED IN THE

TABLES OF

PARAMETRIC DATA)

Symbol

Parameter

Conditions

Min

Typ 1)

Max

Unit

VIT+

Low Voltage Reset Threshold (VDD rising)

VDD Max. Variation 50V/ms

3.6

3.8

3.95

VIT-

Low Voltage Reset Threshold (VDD falling)

VDD Max. Variation 50V/ms

3.45

3.65

3.8

Vhyst

Hysteresis (VIT+ - VIT-)

120 2)

150 2)

180 2)

VtPOR

VDD rise time rate

0.5

V/ms

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