User's Manual
Table Of Contents
- 1: Purpose
- 2: Scope
- 3: VAM-CM Overview
- 4: VAM-CM interfaces
- 4.1: Absolute maximum ratings
- 4.2: VAM Control interface description
- 4.2.1: System USB description
- 4.2.2: USIM interface description
- 4.2.3: VAM control UART interface description
- 4.2.4: Analog Audio interface description
- 4.2.5: Digital Audio interface description
- 4.2.6: Power Supply interface description
- 4.2.7: External VRTC Supply Functionality
- 4.2.8: Control and ID interface description
- 4.3: Radio interface description
- 4.4: VAM-CM Power Management Handling
- 4.5: Mechanical interface
- 4.6: Environmental conditions
- 5: Evaluation tools
DRAFT
3: VAM-CM Overview
3: VAM-CM Overview
The main goal in VAM-CM design is to utilize the IsatPhone 2 high level architecture and provide a
compact core module with a simple single connector control interface to enable board to board
connection.
3.1: VAM Terminal Architecture
A GSPS VAM terminal shall consist of a VAM-CM that is interfaced via and controlled by a VAM
controller board. The VAM controller board takes care of the external interfaces from the user to
VAM-CM and is responsible for VAM CM modem control.
Figure 1
shows an example architecture of a
VAM terminal including the VAM-CM, VAM controller and basic interfaces. The VAM-CM interface is
described in more detail in VAM-CM interfaces on page 11.
Figure 1. VAM Terminal Architecture
3.2: VAM-CM Concept
The target of VAM concept was to produce small GMR 2+ modem with simple cost effective RF and
control interfaces. The VAM-CM design shown in
Figure 2
is optimized from the IsatPhone 2 platform
design by excluding non-necessary handset related interfaces and features, by including industry
standard ‘board to board’ interface connectors and by optimizing the PWB area consumption.
6:GSPS Core Module 2.0 VAM-CM HW Description
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