C8051F970-A-GM Datasheet, PDF (214/454 Pages) Silicon Laboratories – Low Power Capacitive Sensing MCU with up to 32 kB of Flash

C8051F97x
Bit
Name
Function
1
SOVF Soft Overflow Flag.
Hardware sets this bit to 1 when a signed MAC operation causes an overflow into the
sign bit (bit 31) of the accumulator or when an unsigned MAC operation causes an over-
flow into the MAC0OVF register.
Firmware must clear this bit. This bit also clears automatically if firmware clears the accu-
mulator by setting the CLRACC bit in the MAC0CF0 register.
0
BUSY Busy Flag.
Firmware can set this bit to trigger the MAC0 peripheral to start an operation in both
MCU mode and DMA mode.
In MCU mode, the MAC0 module will perform a single MAC operation using data that is
already present in the registers. Hardware clears this bit when the operation completes.
In DMA mode, the MAC0 module will perform the required number of MAC operations as
defined by the DMA registers, fetching the data into and out of the MAC0 registers via
DMA transfers. Hardware automatically clears this bit when when all of the DMA opera-
tions complete.
Rev 1.0
215