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M41ST87Y Fiches technique(PDF) 23 Page - STMicroelectronics

No de pièce M41ST87Y
Description  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  48 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41ST87Y Fiches technique(HTML) 23 Page - STMicroelectronics

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M41ST87Y, M41ST87W
Operating modes
23/48
Figure 17.
Tamper current options
Figure 18.
Tamper output timing (with CLR1EXT or CLR2EXT = '1')
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 19 on page 24.
2.
If the device is in battery back-up; NOT on VCC (see Section 2.6.9: RAM clear external (CLR1EXT and CLR2EXT) on
page 21).
3.
If TIEX = '1.'
4.
If ABE = '1.'
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
1M
Ω
10M
Ω
TCHI/TCLO = 0
TCHI/TCLO = 1
1M
Ω
10M
Ω
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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