Alan McIvor wrote: > > Hi, > > Does anybody have any details on how to use and interpret the > RISC_STATUS bits inside the BT878? This and other areas aren't covered > very well in the Data Sheets. The data sheets mention that there is a > Technical Reference Manual and a Programmer's Guide but whenever I > request them from Conexant I get a copy of the Data Sheet. Do they > actually exist? > > Thanks > > Alan The RISC status bits are under software control. They can be monitored by looking at the top 4 bits of INT_STAT. These map 1:1 with bits 23..20 and 19..16 in a RISC command. When bit 23 is set in a RISC command, bit 31 of INT_STAT is reset. When bit 19 is set in a RISC command, bit 31 of INT_STAT is set. Use this together with bit 24 of a RISC command to trigger an interrupt. You can then read INT_STAT to see which RISC command caused the interrupt. -justin
