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M41ST87W 데이터시트(PDF) 24 Page - STMicroelectronics

부품명 M41ST87W
상세설명  5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM
PDF  54 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST87W 데이터시트(HTML) 24 Page - STMicroelectronics

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Operating modes
M41ST87Y, M41ST87W
24/54
Doc ID 9497 Rev 10
Figure 18.
Tamper current options
Figure 19.
Tamper output timing (with CLR1EXT or CLR2EXT = '1') - available in SOX28 package
only
1.
If connected to a negative charge pump device, this pin must be isolated from the charge pump by using both n-channel
and p-channel MOSFETs as illustrated in Figure 20 on page 25.
2.
If the device is in battery back-up; NOT on VCC (see Section 2.6.9: RAM clear external (CLR1EXT and CLR2EXT) - available
in SOX28 package only on page 22). VOUT is forced to GND during a tamper event when on VCC.
3.
If TIEX = '1.'
4.
If ABE = '1' and device is in battery backup mode.
AI07820
TAMPER LO,
NORMALLY OPEN
TAMPER HI,
NORMALLY CLOSED
User
Configuration
User Configuration
User Configuration
TDS
X = 0
TDS
X = 1
TDS
X = 0
TDS
X = 1
TAMPER HI,
NORMALLY OPEN
TAMPER LO,
NORMALLY CLOSED
CONTINUOUS
MONITORING
CONTINUOUS
MONITORING
CONTINUOUS
MONITORING
SAMPLED
MONITORING
CONTINUOUS
MONITORING
SAMPLED
MONITORING
VCC (VOUT)
TPX (TP1, TP2)
VCC (VOUT)
VCC (VOUT)
TCM
X, TPMX
TCHI/TCLO = 0
TCHI/TCLO = 1
TCHI/TCLO = 0
TCHI/TCLO = 1
TPCLR
VOUT
(1)
RST
Tamper
Event
(TB Bit set)
High-Z
(2)
trec
tCLR
tCLRD
AI07083
ECON
IRQ/OUT
(3)
High-Z
(4)



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