14
KX-PRL260/KX-PRL262/KX-PRD260/KX-PRD262/KX-PRLA20
4.5.6.
Power Supply Circuit/Reset Circuit
The power supply voltage from AC adaptor is converted to VBAT (3.0V) in IC302. And +3.0V for peripherals and analog part is
insulated from VBAT by Doubler of BBIC.
Circuit Operation:
+5.5V
+5.5V
+3.0V
+3.0V
+1.8V
+3.0V_CP
IC501
IC302
IC611
BBIC
AC Adaptor
3.0V
REGULATOR
EEPROM
VDD2
VDD1
VDD4
+3.0V_CP2
IC601
TAM FLASH
D-AMP
VDD5
VDD3
RF Part
LEDs
Q301
Bluetooth
unit
IC721
QSPI FLASH
IC502
+1.8V
IC722
IC411
IC401
5.0V
REGULATOR
Startmonitor
(IC501 57pin)
1.8 V
VBAT
Reset (RSTN)
(IC501_77pin)
BBIC chip initialize
(CKM/STM)