M41ST87W datasheet(9/54 Pages) STMICROELECTRONICS

部件名	M41ST87W

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

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9 / 54 page

M41ST87W

Description

DocID9497 Rev 11

9/54

Table 1: Signal names

(1)

Oscillator input

(1)

Oscillator output

E̅ CON(2)

Conditioned chip enable output

EX(2)

External chip enable

IRQ/OUT(3)

Interrupt/out output (open drain)

PFI1

Power fail input 1

PFI2

Power fail input 2

PFO1(4)

Power fail output 1

PFO2(4)

Power fail output 2

RST(3)

Reset output (open drain)

RSTIN1

Reset 1 input

RSTIN2(2)

Reset 2 input

SCL

Serial clock input

SDA

Serial data input/output

SQW/FT

(4)

Square wave output/frequency test

WDI

(2)

Watchdog input

VCC

Supply voltage

VOUT

Voltage output

VSS

Ground

F32k

(3)

32 kHz square wave output (open drain)

TP1IN

Tamper pin 1 input

TP2IN

Tamper pin 2 input

TPCLR

(2)

Tamper pin RAM clear

VBAT

Positive battery pin input

(5)

No function

(5)

No connect

Notes:

(1)

Available in SSOP package only.

(2)

Available in SOX28 package only.

(3)

Open drain output.

(4)

Programmable output (open drain or full-CMOS).

(5)

Should be connected to VSS.

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