GL850A USB 2.0 Low-Power HUB Controller
RESET#
50ms
GANG_CTL
Output mode, indicating
GL850A is in normal
Input mode, strapping
to decide individual or
gang mode
mode or suspend mode
Figure 5.5 – Timing of PGANG/SUSPND strapping
GAND Mode
DVDD(3.3V)
DVDD(3.3V)
Suspend LED
Indicator
100K ohm
"0": Individual Mode
"1": GANG Mode
PGANG
SUSPNDO
GANG_CTL
Inside GL850A
100K ohm
Suspend LED
Indicator
On PCB
Individual
Mode
Figure 5.6 – GANG Mode Setting
5.2.3 SELF/BUS Power Setting
GL850A can operate under bus power and conform to the power consumption limitation completely
(suspend current < 2.5 mA, normal operation current < 100 mA). By setting PSELF, GL850A can be
configured as a bus-power or a self-power hub.
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