STA016 STMICROELECTRONICS [STMicroelectronics], STA016 Datasheet - Page 39

• Manufacturer Part Number: STA016
• Description: MPEG 2.5 LAYER III AUDIO DECODER SUPPORTING CD-ROM CAPABILITY
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

(the INTLINE[0] pin).
8.0.1
MMDSP write its request inside dedicated host registers (mainly H70 to H78 and H134 to H169), then it signals
to cd_module that it must read a request by sending the interrupt IT_REQ.
Note that IT_REQ interrupt is generated by mmdsp on the IRQB pin of STA016A.
Note also that once it has finished to read the message, cd_module must always acknowledge it by reading
H10.
Figure 7. Block diagram for running the CD application.
Reading a request from mmdsp :
Hxx: host register
number xx
yes
send pause command :
write 2 in H64
send IT_CMD
run the other
application
return
to cd?
no
yes
yes
write 0 in H85, then 1 in H86
send play_music command :
write 1 in SOFT_RESET
start cd-rom application:
send other command :
command?
write 0 in CK_CMD
application?
inserted ?
write 112 in H64
run other
ejected?
with 112 in H70
power on
with 35 in H70
send IT_CMD
send IT_CMD
wait IT_REQ
any
wait IT_REQ
write in H64
cd
cd
no
no
STA016A
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