Data Sheet

ISM14585-L35 Specification
DOC-DS-14585-201807-3.0
Confidential Inventek Systems
Page 86
9.16 PCM Controller
The PCM controller is implementing an up-to 192kHz synchronous interface to external
audio devices, ISDN circuits and serial data interfaces.
It is accessed through the APB32 interface. PCM can individually operate in master or
slave mode. In slave mode, the phase between the external and internal frame sync can
be measured and used to compensate for drift.
The data IO registers have DMA support in order to reduce the interrupt overhead to the
CPU. Up-to 8 channels of 8 bits with a programmable delay are supported in received
and transmit direction.
The controller supports PCM, I2S, TDM and IOM2 formats.
Features:
• PCM_CLK Master/slave
• PCM_FSC
o Master/slave 4 kHz to 96 kHz
o Strobe Length 1, 8, 16, 24, 32, 40, 48 and 64 bits
o PCM_FSC before or on the first bit. (In Master mode)
• 2x32 channels
• Programmable slot delay up-to 31*8bits
• Formats
o PCM mode
o I2S mode (Left/Right channel selection) with N*8 for Left and N*8 for Right
o IOM2 mode (double clock per bit)
• Programmable clock and frame sync inversion
• Direct connection to Sample Rate Converter (SRC)
• Interrupt line to the CPU
• DMA support