PS501 datasheet(9/42 Pages) MICROCHIP

9 / 42 page

 2004 Microchip Technology Inc.

DS21818C-page 9

PS501

TABLE 3-1:

WakeUp EEPROM VALUE

TABLE 3-2:

WakeLevels EEPROM VALUE

TABLE 3-3:

POWER MODE SUMMARY

Bit

Name

Function

WakeIO

Wake-up from I/O Activity

WakeBus

Wake-up from SMBus Activity

5Unused

WakeVolt

Wake-up from Voltage

Enable Shelf-Sleep

Use Ultra Low-Power mode for Shelf-Sleep mode. All other bits

must be zero.

LV Sleep Mode

Use Ultra Low-Power mode as Low-Voltage Sleep mode

Zero Remcap

Set remap to zero when entering Low-Voltage Sleep mode

WakeUp Voltage (2:0)

Voltage

Purpose

000

6.4V

2 cells Li Ion

001

6.66V

2 cells Li Ion

010

8.88V

2 cells Li Ion

011

9.6V

3 cells Li Ion

100

9.99V

3 cells Li Ion

101

11.1V

3 cells Li Ion

110

12.8V

4 cells Li Ion

111

13.3V

4 cells Li Ion

Mode

Entry

Exit

Notes

Run

Measured current > preset threshold

(set by SampleLimit)

Measured current < preset

threshold (set by SampleLimit)

Highest power consumption

and accuracy for rapidly

changing current.

Sample

Measured current < preset threshold

(set by SampleLimit)

Measured current > preset

threshold (set by SampleLimit)

Saves power for low, steady

current consumption. Not as

many measurements needed.

Measurements made every

NSample periods.

Sleep

VPACK < SleepVPack and in

Sample mode

WakeUp voltage level

exceeded (Low-Power mode)

or SMBus pulled high (Ultra

Low-Power mode)

No measurements made.

Shelf-Sleep

SMBus command

WakeUp register conditions

met (Low-Power mode) or

SMBus pins pulled high (Ultra

Low-Power mode)

No measurements made.

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