M41ST87Y_08 datasheet(23/48 Pages) STMICROELECTRONICS

部件名	M41ST87Y

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	48 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

23 / 48 page

M41ST87Y, M41ST87W

Operating modes

23/48

Figure 17.

Tamper current options

Figure 18.

Tamper output timing (with CLR1EXT or CLR2EXT = '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.

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).

If TIEX = '1.'

If ABE = '1.'

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

10M

TCHI/TCLO = 0

TCHI/TCLO = 1

10M

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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