User's Manual

VS500 USER MANUAL
Confidential & Proprietary of VACOM 8/13 Page Date : 05-08-08, Rev No : 1.0
Control No.: MSD351A0VS500
Originated by Hard Ware 3 Team
3.2.1.2.3 Audio AMP/Audio Interface
Audio AMP amplifies and sounds Alert Tone or Receiving Call Ringing. Its signal source is from
internally generated codec circuit of MSM6000. Its output gain is set by H/W but sound volume can be
controlled by S/W.
Key Tone is transmitted to Receiver unit after converting VOCODER DTMF Signal in MSM6000 to
AUDIO RX PATH Signal. If a hand-free mode is started by using like earphone, Key Tone is sounded
through the hands-free path. And also during the conversation, Ring Back Tone or Voice is sounded
through a Hands-free speaker and MIC in this mode.
3.2.1.3 POWER MANAGEMENT PART
The PM6610 device integrates all handset power management and some user interface functions.
a. Input Power Management: An unregulated external power requires the PM6610 IC to provide
closed-loop control of the pass transistor. In this mode, the handset supply voltage and current
are regulated by the PM6610 IC for battery charging or normal operation
b. Output Voltage Regulation: Seven voltage regulators are provided all have programmable
voltages and derived from a common band-gap reference using low dropout voltage circuits.
c. ADC interface: it allows precise voltage and current measurement of external power and battery
for charging control and voltage/current control of main power. PM6610 forwards multiplexed
analog voltage to one of HKADC in MSM for analog to digital conversion
d. User interfaces: PM6000 IC also supports common handset-level user interfaces like power-on
key sensing and driving LEDs or vibration motor.
e. IC interfaces: The primary IC-level interface is the MSM-compatible 3-line serial bus
interface(SBI) that provides efficient initialization, status checking and control of chipsets.
Configurable device parameters are set through SBI control register, while many other registers
are available to report parameter settings, device status, and interrupt events.
3.2.1.4 I/O Interface
It provides with interface between handset and peripheral accessory such as charger, level translator or
data cable for data communication. Basically it has a pin for supply external power to power
management part and two data lines for RS232C protocol. One pin to detect level translator or charger
ignition is provided.