GL3522-22 Datasheet

© 2014 Genesys Logic, Inc. - All rights reserved.

Page 20

GLI Confidential

4.3.2 PGANG Setting

To save pin count, GL3522-22 uses the same pin to decide individual/gang mode as well as to output the

suspend flag. The individual/gang mode is decided within 21us after power on reset. Then, about 50ms later,

this pin is changed to output mode. GL3522-22 outputs the suspend flag once it is globally suspended. For

individual mode, a pull low resister greater than 100KΩ should be placed. For gang mode, a greater than

100KΩ pull high resister should be placed. In figure 4.7, we also depict the suspend LED indicator

schematics. It should be noticed that the polarity of LED must be followed, otherwise the suspend current

will be over spec limitation (2.5mA).

RESET#

GANG_CTL

50 ms

Input mode, strapping

to decide individual or

gang mode

Output mode, indicating

GL3522 is in normal

mode or suspend mode

Figure 4.6 - Timing of PGANG Strapping

DVDD(3.3V)

100K ohm

100K ohm

DVDD(3.3V)

Suspend LED

Indicator

Suspend LED

Indicator

GAND Mode

Individual

Mode

"0": Individual Mode

"1": GANG Mode

SUSPNDO

GANG_CTL

Inside GL3522

On PCB

Figure 4.7 - GANG Mode Setting