User guide

CM52 Integrators’ Manual
WI_DEV_CM52_UGD_001-001
Page 27 of 53
CM52 Integrators’ Manual
Figure 12: RTC Functional Block Diagram
2.6 Audio Interface
The audio-related signals are: the analog audio signals
 ATMS (Audio to Mobile Station),
 AFMS (Audio from Mobile Station),
 PCM (Pulse Code Modulation) signals (PCMULD, PCMDLD, PCMCLK, and PCMSYNC).
Pin Signal Description
7 AFMS Audio Output From Wireless CPU
®
.
10 ATMS Audio Input to Wireless CPU
®
.
9 AGND Analog Reference
17 PCMCLK PCM Clock Output from Wireless CPU
®
.
18 PCMSYNC PCM Frame Sync Output from Wireless CPU
®
.
19 PCMULD PCM Voice Input to Wireless CPU
®
20 PCMDLD PCM Voice Output from Wireless CPU
®
.
Table 16: CM52 Audio Signals
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