Hardware Description
32
98-08901C63-A
3.7.5
Digital Audio Interface
Digital audio signals can be used as general-purpose I/Os when the digital audio interface is not needed. Table 12 lists the c18
digital audio interface signals.
3.8
ANTENNA
This section describes the available RF antenna connectors and their requirements.
3.8.1
RF Connectors
Two female MMCX antenna connectors are provided for RF input/output in the c18 module:
• Cellular Bands Antenna Connector (J31)
• GPS Antenna Connector (J30)
Both RF connectors (J30 and J31) are 50-ohm connectors with VSWR less than 2:1. Figure 18 shows the c18 module’s antenna
connectors.
There are three supported antenna port configurations, as follows:
• A single-port solution that supports CDMA1X/AMPS/GPS bands (with a passive antenna) using the J31 connector.
• A single-port solution that supports CDMA1X/AMPS bands only using the J31 connector.
• A dual-port solution in which the J31 connector is used to support CDMA1X/AMPS only, and the J30 connector is used to
support the GPS band (with an active or passive antenna).
Table 12. Digital Audio Interface Signals
Signal Name
70-pin Connector
Pin Number
Description
PCM_DIN_GPIO1
18
PCM input to c18
PCM_DOUT_GPIO2
20
PCM output from c18
PCM_CLK_GPIO3
22
PCM Clock signal
PCM_FS_GPIO4
24
PCM Sync signal
Note
Digital audio is hardware supported.
Summary of Contents for c18
Page 1: ...Developer s Guide Motorola c18 Cellular Engine Module Description 98 08901C63 A ...
Page 8: ...viii 98 08901C63 A ...
Page 20: ...Introduction 12 98 08901C63 A ...
Page 46: ...Hardware Description 38 98 08901C63 A ...
Page 56: ...Mechanical Description 48 98 08901C63 A Figure 22 c18a1 Bottom View Figure 23 c18a1 Side View ...
Page 57: ...98 08901C63 A 49 Mechanical Description Figure 24 c18c Top View Figure 25 c18c Bottom View ...
Page 60: ...Service Support 52 98 08901C63 A ...
Page 62: ...Suggested Connectors 54 98 08901C63 A ...
Page 78: ...Hardware Requirements for CDG2 and Field Testing 70 98 08901C63 A ...
Page 82: ...Index 74 98 08901C63 O ...