Intermec 073289-001 User Manual
Chapter 4 — Theory of Operation
Power System
Architecture, Power Supplies
Power Supply Controller
I2C Bus
Scan + 5 Volts
+ 3.3 Volt Backup
Regulator
FPGA power enable
Aquila (CX1) Power Supply
Block Diagram (6/26/02)
Voltage Limit
detector
PLL_VCC
LDO
Manual
Reset
3.3V Reset
Supercap
Voltage
Reference
Temp
Sensor
Supercap Charge
Enable
PWR_EN
RESET_IN
BATT_FAULT_IRQ
VDD_FAULT*
PSC_IRQ*
SUS_RES*
FPGA
(+2.5 Volts)
Voltage Detect
Voltage
Conditioner
LDO
Vcc
Core Voltage
Regulator
(.8 - 1.5V)
En
Filter
Network
Vbatt_wall from
Battery Pack
PWR_EN
+ 5 Volt
Regulator
+ 3.3 Volt
Regulator
Regulator
Cur. Iimited Switch
Cur. Iimited Switch
Cur. Iimited Switch
Teth Scan Vcc
Scan 3.3 Volts
DOCK_EN
PCI_3.3 Volts
FET Switch
+5 V to Status LEDs
SCAN_PWR_EN
Cur. Iimited Switch
CF_PWR_EN
3.3 volts (Batt_Vcc, Vccq,
memory, etc)
SD_Vcc
SD_PWR_EN
FET Switch
BT_Vcc
BT_PWR_EN
LDO
AUDIO_5 V
LED Backlight Supply
LCD Bias Generator
LCD BIAS SUPPLY
LED BACKLIGHT
(color display)
BKLT_ON
BKLT_LOW
BKLT_LOW
LCD_VDD_EN
PWM BIAS ADJUST
I/O KEY
PROG_EN
SERIAL_PROG_CLK
SERIAL_PROG_DATA
Architecture and Power Supplies
CK30 Handheld Computer Service Manual
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