SM1126 View Datasheet(PDF) - Nippon Precision Circuits
Part Name
Description
MFG CO.
'SM1126' PDF : 18 Pages View PDF
SM1126 Series
Write command
The SRAM write command (11011111), shown below, is used to invoke write mode.
PLAY mode changed to WRITE mode
SIO
1
1
0
1
1
1
1
1
Address set to tempo-word register
SC
ST
Figure 10. Write command timing
Tempo word
The tempo word controls the melody playback speed. The tempo word comprises a fixed code (000) fol-
lowed by the tempo code (T4 to T0), as shown below. The tempo word is always the first word written after
invoking write mode, and all subsequent words are melody data words.
SIO
WRITE command
0 0 0 T4 T3 T2 T1 T0
SC
Changed to WRITE mode
ST
write Tempo-word
ADDRESS
No Address
Tempo Register Address
Figure 11. Tempo word timing
RAM Address
NIPPON PRECISION CIRCUITS—11
Share Link: 
