User's Manual
Table Of Contents
- Contents
- Figures
- Tables
- Document History
- Introduction
- Product concept
- Application Interface
- Antenna interface
- Electrical, reliability and radio characteristics
- Mechanics
- Reference Approval
- List of parts and accessories
MC46 Hardware Interface Description
DRAFT
MC46_HD_V02.8xb Page 59 of 98 21.08.2003
3.12.2 Outputs
3.12.2.1 Synchronization signal
The synchronization signal serves to indicate growing power consumption during the
transmit burst. The signal is generated by the SYNC pin (pin number 32). Please note that
this pin can adopt two different operating modes which you can select by using the
AT^SSYNC command (mode 0 and 1). For details refer to the following chapter and to [1].
To generate the synchronization signal the pin needs to be configured to mode 0 (= default).
This setting is recommended if you want your application to use the synchronization signal
for better power supply control. Your platform design must be such that the incoming signal
accommodates sufficient power supply to the MC46 module if required. This can be
achieved by lowering the current drawn from other components installed in your application.
The characteristics of the synchronization signal are explained below.
Table 18: MC46 synchronization signal (if SYNC pin is set to mode 0 via AT^SSYNC)
Function Pin Pin status Description
Low No operation Synchronization SYNC
High Indicates increased power consumption
during transmission.
Figure 22: SYNC signal during transmit burst
*)
The duration of the SYNC signal is always equal, no matter whether the traffic or the
access burst are active.
Transmit burst
1 Tx 577 µs every 4.616 ms
2 Tx 1154 µs every 4.616 ms
300 µs
SYNC signal
*)