M41ST87WMX6F datasheet(20/54 Pages) STMICROELECTRONICS

部件名	M41ST87WMX6F

功能描述	5.0 and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM

PDF	54 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

20 / 54 page

Operating modes

M41ST87W

20/54

DocID9497 Rev 11

Table 4: Tamper detection truth table

Option

Mode

TCMX

TPMX

Normally open/tamper to GND

(1)

Normally open/tamper to VOUT

(1)

III

Normally closed/tamper to GND

Normally closed/tamper to VOUT

Notes:

(1)

No battery current drawn during battery backup.

Figure 15: Basic tamper detect options

Available in SOX28 package only.

Figure 16: Tamper detect output options

Available in SOX28 package only.

TAMPER LO,

NORMALLY OPEN

TAMPER HI,

NORMALLY, CLOSED

User

Configuration

TCM

X, TPMX

IRQ - Interrupt the

processor on tamper

CLR - Clearexternal

RAM on tamper(1)

CLR - Clear internal

RAM on tamper

Time stamp tamper

event

CLRX

EX T

TIE

CLRX

TAMPER HI,

NORMALLY OPEN

TAMPER LO,

NORMALLY CLOSED

Triggering Event

Tamper Event Output

TCMX, TPMX = 1,1

TCMX, TPMX = 0,0

TCMX, TPMX = 1,0

TCMX, TPMX = 0,1

VCC (VOUT)

IRQ - Interrupt the

processor on tamper

User

Configuration

TPCLR - Clear external

RAM on tamper (1)

RESET OUT

CLR - Clear 128 bytes

internal RAM on tamper

Time stamp tamper

event (to RTC)

CLR1 EXT

TIE1

CLR1

CLR2 EXT

TIE2

CLR2

(other reset sources)

TEB2

TP2

TEB1

TP1

M41ST87WMX6F 数据表(PDF) 20 Page - STMicroelectronics

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