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ST72321 bảng dữ liệu(PDF) 141 Page - STMicroelectronics

tên linh kiện ST72321
Giải thích chi tiết về linh kiện  64/44-PIN 8-BIT MCU WITH 32 TO 60K FLASH/ROM, ADC,FIVE TIMERS, SPI, SCI, I2C INTERFACE
PDF  189 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST72321 bảng dữ liệu(HTML) 141 Page - STMicroelectronics

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OPERATING CONDITIONS (Cont’d)
12.3.2 Operating Conditions with Low Voltage Detector (LVD)
Subject to general operating conditions for VDD, fCPU, and TA.
Notes:
1. Data based on characterization results, tested in production for ROM devices only.
2. When VtPOR is faster than 100 µs/V, the Reset signal is released after a delay of max. 42µs after VDD crosses the
VIT+(LVD) threshold.
3. 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.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIT+(LVD)
Reset release threshold
(VDD rise)
VD level = High in option byte
4.0 1)
4.2
4.5
V
VD level = Med. in option byte3)
VD level = Low in option byte3)
3.55 1)
2.95 1)
3.75
3.15
4.01)
3.351)
VIT-(LVD)
Reset generation threshold
(VDD fall)
VD level = High in option byte
3.8
4.0
4.25 1)
VD level = Med. in option byte3)
VD level = Low in option byte3)
3.351)
2.81)
3.55
3.0
3.751)
3.15 1)
Vhys(LVD)
LVD voltage threshold hysteresis 1)
VIT+(LVD)-VIT-(LVD)
150
200
250
mV
VtPOR
VDD rise time
1)2)
LVD enabled
6
20000
µs/V
tg(VDD)
VDD glitches filtered (not detected)
by LVD 1)
40
ns



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