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1. MAIN SYSTEM CONTROLLER IC1003
When MAIN SYSTEM CONTROLLER IC1003 starts up, it outputs “H” signal from Pin-147[PQ1/FFCLR]. By this “H” signal, the switch inside IC1001 is turned “ON”. Then
XDCIN_DET signal is input to Pin-150 [PQ4] of MAIN SYSTEM CONTROLLER IC1003. IC1003 detects whether the driving voltage is the battery voltage or DC-IN 6V voltage
supplied from AC power adapter by using the input voltage shown in Table.1-2.
Table.1-2 Detecting DC-IN 6V voltage
IC1003 Pin-150 [PQ4]
Description
L
DC-IN 6V voltage is supplied.
H
DC-IN 6V voltage is not supplied.
2. System Controller Circuit inside IC9003
When any of the input signals to pin-2 [XWK4] through pin-5 [XWK1] of Power Control IC9003 changes from “H” to “L”, the system controller section inside IC9003 wakes up.
The “wake-up conditions” of the unit is shown in Table 1-3.
Table.1-3 Wake-up conditions
Pin-5 [XWK1] of IC9003
Pin-4 [XWK2] of IC9003
Pin-3 [XWK3] of IC9003
Pin-2 [XWK4] of IC9003
Condition
When any key of the remote controller is
pressed
pressed
When any key of the unit is
pressed
pressed
When VBUS voltage is supplied
to the unit. (Refer to Fig.1-1)
to the unit. (Refer to Fig.1-1)
When DC-IN 6V voltage is
supplied to the unit from AC
power adapter.
(Refer to Fig.1-1)
supplied to the unit from AC
power adapter.
(Refer to Fig.1-1)
3. MAIN SYSTEM CONTROLLER IC1003
MAIN SYSTEM CONTROLLER IC1003 detects whether the battery is inserted or not by using the input status shown in Table.1-4.
Table.1-4 Battery Detection
IC1003 Pin-118 [PD0]
Description
H
Battery is inserted.
L
Battery is not inserted.
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