ATJ2073 ETC, ATJ2073 Datasheet - Page 27

• Manufacturer Part Number: ATJ2073
• Description: The Atj2073 is a Single-chip Highly-intergrated Digital Music System Solution for Devices such as Dedicated Audio Players, Pdas, and cell Phones
• Manufacturer: ETC

6
6.1 How System Power Up
Page 27 of 45
When pin VBAT get to about 0.8V level , DC-DC converter. will begin to rise up VDD and VCC. Low
frequency oscillator will begin to work too. After a duration , POR(Power On Reset) will deassert .
ATJ2073 finishes Power Up sequence . If pin RESET- is not assert, MCU will run from address=0x8000.
Boot code at address=0x8000 will be as the following:
Start:
BATOK
Control Interfaces
JP 8003h
LD A, 01h
OUT (04h), A
JP Start
… …
LOSCO
LOSCI
VBAT
ATJ2073
0.8v
DF_7
RTC
VL0
DCDIS
DF_6
VL1
rst-
...
DF_5
VL2
reset
DF_4
BATOK
DF_6
BATOK
VL3
SEL
MUX
SEL
DCDIS
BATOK
DCDIS
DCDIS
BATOK
DCDIS
rst-
RESET-
Actions Semiconductor Co.,LTD
DCDIS BATSEL VREFI
DCDIS
regulator
DCDC2
DCDC1
SEL
1.5v
Data Sheet
VP1
VP2
VDD
DCF2
DCOP2
DCOP1
DCF1