Specifications

Rev 8 Apr.14 Proprietary and Confidential - Contents subject to change 23
3
3: Electrical Specifications
The system block diagram in Figure 3-1 on page 24 represents the
MC7304 module integrated into a host system. The module includes
the following interfaces to the host:
PowerSupplied to the module by the host.
W_DISABLE_NActive low input from a hardware switch to the
MC7304 that disables the main RF radio.
WAKE_N Signal used to wake the host when specific events
occur.
WAN_LED_NActive-low LED drive signal provides an indication
of RADIO ON state, either WAN or GNSS.
SYSTEM_RESET_NActive-low reset input.
AntennaThree U.FL RF connectors (one for Rx/Tx, one for Rx
only, and one for GNSS). For details, see RF Specifications on
page 41.
SIMSupported through the interface connector. The SIM
cavity / connector must be placed on the host device for this
feature.
USBInterface to the host for data, control, and status infor-
mation.
Antenna controlThree signals that can be used to control
external antenna switches.
Dynamic power controlSignal used to adjust Tx power to meet
CE SAR requirements. For details, see Tx power control on
page 57.
PCM/I
2
S audio interface PCM or Inter-IC Sound (I
2
S) serial bus
for digital audio.
The MC7304 has two main interface areasthe host I/O connector
and the RF ports. Details of these interfaces are described in the
sections that follow.