Integration Manual
Table Of Contents
- Contents
- Tables
- Figures
- 0. Document History
- 1. Introduction
- 2. Product Concept
- 3. Application Interface
- 4. Antenna Interface
- 5. Electrical, Reliability and Radio Characteristics
- 6. Mechanics
- 7. Board-to-Board Application Connector
- 8. Reference Approval
HMS1 Hardware Interface Description
Confidential / Preliminary
s
HMS1_HD_V01.62 Page 22 of 39 2006-08-21
3.8. Control Signals
Several control lines are signaling the states of the HMS1 module or control the module.
These states are power down, stand by, paging, GSM voice call, GSM data call, UMTS voice
call, UMTS data call or HSDPA connection.
3.8.1. PWR_IND Signal
PWR_IND notifies the on/off state of the module. High state of PWR_IND indicates that the
module is switched off. The state of PWR_IND immediately changes to low when IGT is
pulled low. For state detection an external pull-up resistor is required.
3.8.2. Status Signals
Two status signals (GREEN, BLUE) are provided for signaling the module’s connectivity
status:
• When searching for a network the signal 1 (GREEN) alternates at 2Hz
• When registered with a GSM network signal 1 is active
• When registered with a WCDMA network signal 2 (BLUE) goes active, signal 1 inactive