CN8478 Datasheet, PDF (148/221 Pages) Conexant Systems, Inc – Multichannel Synchronous Communications Controller (MUSYCC)

6.0 Basic Operation
6.3 Channel Operation
CN8478/CN8474A/CN8472A/CN8471A
Multichannel Synchronous Communications Controller (MUSYCC™)
6.3.6 Memory Protection Descriptor
/* memory protection disabled = 0 */
GroupStr0.MemoryProtectDescr = 0x00000000;
/* either write directly into MUSYCC register - or - use a service request */
*(MUSYCC_FUNC_0_BAR + GROUP_CONFIG_DESCR_OFFSET) =
GroupStr0.MemoryProtectDescr;
The components of the Memory Protection Descriptor are listed in Table 6-5.
Table 6-5. Example—Components of Memory Protection Descriptor
Descriptor
Component of Descriptor
Memory Protection Descriptor
PROTENBL
Value of Components
0 = Memory protection disabled
6.3.7 Port Configuration Descriptor
/* three-state transmitter output = 0 */
/* rx out of frame signal active edge = 0, falling edge */
/* rx synchronization signal active edge = 0, falling edge */
/* rx data signal active edge = 0, falling edge */
/* tx synchronization signal active edge = 0, falling edge */
/* tx data signal active edge = 0, falling edge */
/* port mode = 1, E1 32 time slot */
GroupStr0.PortConfigDescr = 0x00000001;
/* either write directly into MUSYCC register - or - use a service request */
*(MUSYCC_FUNC_0_BAR + PORT_CONFIG_DESCR_OFFSET) = GroupStr0.PortConfigDescr;
The components of the Port Configuration Descriptor are listed in Table 6-6.
Table 6-6. Example—Components of Port Configuration Descriptor
Descriptor
Component of
Descriptor
Value of Components
Port
Configuration
Descriptor
TRITX
ROOF_EDGE
RSYNC_EDGE
RDAT_EDGE
TSYNC_EDGE
TDAT_EDGE
PORTMD
0 = Three-state output when transmitter enabled and time slot is not
mapped
0 = Active edge of signals is falling edge
1 = 32 channel with E1 signalling
6-14
Conexant
100660E