M41ST87WMX6 datasheet(24/52 Pages) STMICROELECTRONICS

部件名	M41ST87WMX6

功能描述	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	52 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

24 / 52 page

Operating modes

M41ST87Y, M41ST87W

24/52

Doc ID 9497 Rev 8

Figure 18.

Tamper current options

Figure 19.

Tamper output timing (with CLR1EXT or CLR2EXT = '1') - available in SOX28 (MX)

package only

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.

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.

If TIEX = '1.'

If ABE = '1' and device is in battery backup mode.

AI07820

TAMPER LO,

NORMALLY OPEN

TAMPER HI,

NORMALLY CLOSED

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)

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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