3.14 Power Block Interface. LG KG370

3. TECHNICAL BRIEF

3.14 Power Block Interface

VBAT

FB100

C109

0.1u

C105

2.2u

C106

1u

C107

1u

C108

1u

C8

KP0

C100

1u

C101

1u

C102

1u

C103

1u

R100

C110

22K

220n

C104

4.7u

REXT

D12

XOX

A9

A8

Figure 3-14-1 Power Block interface

The E-Gold voice integrated power management unit (PMU) supports direct connection to battery

(DCB). That means all supply voltages needed are generated on-chip with integrated linear voltage regulators. The input of these linear voltage regulators is the battery voltage. The external memory and

SIM card supply is provided by the on-chip voltage regulators. Table 144 is an overview of the internal generated supply voltages.

The integrated power management also provides the control state machine for system start up, including start up with discharged batteries, trickle charging and system reset control. After system start up several methods are implemented for active and idle power saving.

LGE Internal Use Only - 40 Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

3. TECHNICAL BRIEF

Name

LRTC

LD1

LIO

LRFXO

LMEM

LANA

LSIM

LBUF

LRFRX

LRFTRX

Output Voltage(V) Output Current (mA) Comment

2.0

4 Used for the real time and digital PMU supply

1.2/1.5

1.8/2.85

2.5

1.8/2.85

150

30

10

100

Used for the core supplies (MCU and DSP via switch)

Used for the I/O pad supply and, for example, the display

Used for the crystal oscillator supply

Used for the external memory supply, voltage can be configured during startup

2.5

100

1.8/2.85

2.6/2.8/3.0/3.2

2.5

1.5

30

300

100

120

Used for analog (audio and baseband processing) and headset driver

Used of the SIM card supply

Used for the loudspeaker and earpiece driver

Used for the RF RX part

Used for the RF TX/TX part

Figure 3-14-2 EGlod Voice PMU

LDO output voltage selection

• LD1, LIO, LSIM, LBUF output voltage programmable by software.

• LMEM output voltage is selectable by pin configuration upon startup.

Active and idle power saving options:

• The flexible clock switching options allow minimizing the power consumption during the operation phases of the E-GOLD voice.

• Current consumption during the standby mode is minimized by reducing the clock to 32 kHz and switching it off for most of the device. In addition, the power supply for the TEAKLite ROM is switched off and the controller RAM is switched to a power saving mode.

Start-up and Reset Control State Machine Features

• Power up upon battery insertion, push button, alarm, charger connection.

• Detection of battery exchange or re-insertion.

• Complete start-up sequence management.

• System turn-on, system turn-off operation management including emergency (under-voltage) and programmed shutdown functions.

• Internal reset of the baseband, including silent reset.

• Tri-state function of the baseband module.

• Standby mode controlled by VCXO_EN provided by SCCU module.

Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

- 41 LGE Internal Use Only