TMP91C824
91C824-254
2008-02-20
(13)
Melody/alarm generator
Symbol
Name
Address
7 6 5 4 3 2 1 0
AL8 AL7 AL6 AL5 AL4 AL3 AL2 AL1
R/W
0 0 0 0 0 0 0 0
ALM
Alarm
pattern
register
330H
Alarm pattern set
FC1 FC0
ALMINV
−
−
−
−
MELALM
R/W R/W
R/W
R/W
R/W
R/W
R/W
0
0 0 0 0 0 0
MELALMC
Melody/
alarm
control
register
331H
Free-run counter
control
00: Hold
01: Restart
10: Clear
11: Clear and start
Alarm
frequency
invert
1: Invert
Always write 0
Output
frequency
0: Alarm
1: Melody
ML7 ML6 ML5 ML4 ML3 ML2 ML1 ML0
R/W
0 0 0 0 0 0 0 0
MELFL
Melody
frequency
register-L
332H
Melody frequency set (Low 8 bits)
MELON
ML11
ML10 ML9 ML8
R/W
R/W
0 0 0 0 0
MELFH
Melody
frequency
register-H
333H
Melody
counter
control
0: Stop and
clear
1: Start
Melody frequency set (High 4 bits)
−
IALM4E
IALM3E
IALM2E IALM1E IALM0E
R/W
R/W
0
0
0
0
0 0
ALMINT
Alarm
interrupt
enable
register
334H
Always
write 0
INTALM4 to INTALM0 alarm interrupt enable