X40014V8-A datasheet(6/25 Pages) XICOR

Part #	X40014V8-A

Description	Dual Voltage Monitor with Integrated CPU Supervisor

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Manufacturer	XICOR [Xicor Inc.]

Direct Link	http://www.xicor.com

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X40010/X40011/X40014/X40015 – Preliminary

Characteristics subject to change without notice.

6 of 25

REV 1.3.4 7/12/02

www.xicor.com

Figure 5. VTRIPX Set/Reset Sequence (X = 1, 2)

VTRIPX Programming

Apply VCC and Voltage

Decrease VX

Actual VTRIPX -

Desired VTRIPX

DONE

Set Higher VX Sequence

Error < MDE–

| Error | < | MDE |

YES

NO

Error > MDE+

> Desired VTRIPX to VX

Desired

Present Value

VTRIPX

Execute

No

YES

Execute

VTRIPX Reset Sequence

Execute

Set Higher VTRIPX Sequence

New VX applied =

Old VX applied + | Error |

New VX applied =

Old VX applied - | Error |

Execute Reset VTRIPX

Sequence

Output Switches?

Note: X = 1, 2

Let: MDE = Maximum Desired Error

Vx = VCC, VxMON

MDE+

Desired Value

MDE–

Acceptable

Error Range

Error = Actual - Desired

WEL: Write Enable Latch (Volatile)

The WEL bit controls the access to the memory and to

the Register during a write operation. This bit is a vola-

tile latch that powers up in the LOW (disabled) state.

While the WEL bit is LOW, writes to any address,

including any control registers will be ignored (no

acknowledge will be issued after the Data Byte). The

WEL bit is set by writing a “1” to the WEL bit and zeros

to the other bits of the control register.

Once set, WEL remains set until either it is reset to 0

(by writing a “0” to the WEL bit and zeros to the other

bits of the control register) or until the part powers up

again. Writes to the WEL bit do not cause a high volt-

age write cycle, so the device is ready for the next

operation immediately after the stop condition.

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