User's Manual

SC14CVMDECT SF Cordless Voice Module
© 2012 Dialog Semiconductor B.V. 23 July 1, 2014 v1.6
4.11.2 Deregistration
There are two ways of deregistering a PP from an FP:
• Remote FP and PP deregistration
The correct way to deregister a PP from an FP is to
deregister it remotely in the FP. If this is done over a
service connection from the PP to the FP, the FP
actually performs the deregistration and then it is
automatically signalled to the PP which in turn will
drop out-of-lock. Using this method it is also possible
to deregister other PPs registered to the FP from
one PP.
• Removing all registrations at once from the FP (e.g.
in case the original PPs are lost).
4.12 PCM INTERFACE
The PCM supports the following modes:
• SLAVE mode clock sync. In this mode the clock of
the module will be adjusted to follow the PCM pro-
vided by the external PCM master clock. All audio
samples are kept if the provided PCM clock accu-
racy is +/- 5 ppm, which is a DECT radio require-
ment.
• SLAVE no clock sync. In this mode the clock of the
module is not synchronized. This means audio sam-
ple will be discarded in case the master PCM clock
is faster than the clock of the module or samples will
be repeated in case the master PCM clock is slower.
• MASTER mode. The FP is master on PCM interface
and therefore provides PCM clock and PCM_FSC to
an external device.
4.12.1 PCM Interface for FP
The SC14CVMDECT SF supports PCM interface func-
tionality to connect to an external audio source/destina-
tion.
The different PCM interface modes and timings are
shown in Figure 21 to 26. Refer to document [1] for
detailed information.
4.12.2 PCM_FSC frequency
The PCM interface supports the following options:
• 8 kHz
• 16 kHz
4.12.3 Length of PCM_FSC
The PCM interface supports the following options:
• 1: The length of PCM_FSC pulse is equal to
1 data bit.
• 8: The length of PCM_FSC pulse is equal to
8 data bits.
• 16: The length of PCM_FSC pulse is equal to
16 data bits.
• 32: The length of PCM_FSC pulse is equal to
32 data bits.
4.12.4 Start position of FSC
The PCM interface supports the following options:
• The FSC pulse starts 1 data bit before
the MSB bit of the PCM channel 0 data.
• The FSC pulse starts at the same time as
the MSB bit of the PCM channel 0 data.
4.12.5 PCM clock frequency
The PCM interface supports the following options in
master mode:
• 1.152 MHz
• 2.304 MHz
Figure 20 Handling product identities