Chapter 19 Simple Sound Generator (SSGV1)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
674
Freescale Semiconductor
Figure 19-24. Non-attack/decay mode Register Reload
19.4.6
SSG Output Control
There are two output signals, SGA and SGT. SGA outputs the sound amplitude while SGT can output tone
or tone mixed with amplitude. The SGT output selection is determined by OMS of SSGCR. When OMS
is cleared, the SGA output is disable, the SGA shared pins can be used as other function.
19.5
Interrupt
When the RNDI of SSGIF and RNDIE of SSGIE are all set, interrupt will be generated. Besides normal
reload interrupt, RNDI will be set when SSG start with RDR set, so the second configuration data can be
set base on reload interrupt.
duration
Tone
RDR
reload point
stop point
reload and restart
where : Assume one tone duration contains 3 tone cycle
RDR is the RDR bit of SSGCR register
