ST72325J4T6(2007) 查看數據表（PDF） - STMicroelectronics

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ST72325J4T6
(Rev.:2007)

8-bit MCU with 16 to 60K Flash/ROM, ADC, CSS, 5 timers, SPI, SCI, I2C interface

STMicroelectronics 

OPERATING CONDITIONS (Cont’d)

12.3.2 Operating Conditions with Low Voltage Detector (LVD)

Subject to general operating conditions for VDD, fCPU, and TA.

Symbol

VIT+(LVD)

VIT-(LVD)

Vhys(LVD)

VtPOR

tg(VDD)

Parameter

Reset release threshold

(VDD rise)

Conditions

VD level = High in option byte

VD level = Med. in option byte2)

VD level = Low in option byte2)

Min

4.01)

3.551)

2.951)

Reset generation threshold

(VDD fall)

VD level = High in option byte 3.8

VD level = Med. in option byte2) 3.351)

VD level = Low in option byte2) 2.81)

LVD voltage threshold hysteresis VIT+(LVD)-VIT-(LVD)

VDD rise time 3)

LVD enabled

VDD glitches filtered (not detect-

ed) by LVD 3)

6µs/V

Typ

4.2

3.75

3.15

4.0

3.55

3.0

200

Max

4.5

4.01)

3.351)

4.251)

3.751))

3.15 1)

100ms/V

40

Unit

V

mV

ns

Notes:

1. Data based on characterization results, tested in production for ROM devices only.

2. If the medium or low thresholds are selected, the detection may occur outside the specified operating voltage range.

Below 3.8V, device operation is not guaranteed.

3. Data based on characterization results, not tested in production.

12.3.3 Auxiliary Voltage Detector (AVD) Thresholds

Subject to general operating conditions for VDD, fCPU, and TA.

Symbol

VIT+(AVD)

VIT-(AVD)

Vhys(AVD)

∆VIT-

Parameter

Conditions

1⇒0 AVDF flag toggle threshold

(VDD rise)

VD level = High in option byte

VD level = Med. in option byte

VD level = Low in option byte

0⇒1 AVDF flag toggle threshold

(VDD fall)

VD level = High in option byte

VD level = Med. in option byte

VD level = Low in option byte

AVD voltage threshold hysteresis VIT+(AVD)-VIT-(AVD)

Voltage drop between AVD flag set

and LVD reset activated

VIT-(AVD)-VIT-(LVD)

Min

4.41)

3.95 1)

3.4 1)

4.21)

3.751)

3.21)

Typ

4.6

4.15

3.6

4.4

4.0

3.4

200

450

Max

4.91)

4.41)

3.81)

4.65 1)

4.2 1)

3.61)

Unit

V

mV

mV

1. Data based on characterization results, tested in production for ROM devices only.

12.3.4 External Voltage Detector (EVD) Thresholds

Subject to general operating conditions for VDD, fCPU, and TA.

Symbol

Parameter

Conditions

VIT+(EVD)

VIT-(EVD)

Vhys(EVD)

1⇒0 AVDF flag toggle threshold

(VDD rise)1)

0⇒1 AVDF flag toggle threshold

(VDD fall)1)

EVD voltage threshold hysteresis

VIT+(EVD)-VIT-(EVD)

1. Data based on characterization results, not tested in production.

Min Typ Max Unit

1.15 1.26 1.35

V

1.1

1.2

1.3

200

mV

145/196

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