Toshiba TMP91C815F Data Book page 272

(13) Melody/Alarm Generator
Symbol Name Address
Alarm –
ALM Pattern 330H
Reg
Melody/
MEL-A
331H
Alarm
LMC
Control
Reg
Melody
MELFL 332H
Frequency
L-Reg
Melody
MELFH 333H
Frequency
H-Reg
Alarm
ALMINT 334H
Interrupt
Enable
Reg
7 6 5
AL8 AL7 AL6
FC1
FC0 ALMINV
R/W R/W
0 0
Free-run counter Control Alarm
00: Hold Frequency
01: Restart Invert
10: Clear 1: Invert
11: Clear & Start
ML7 ML6 ML5
MELON
R/W
0
Melody
counter
Control
0: Stop and
Clear
1: Start
Always
write 0
91C815-
4 3
AL5 AL4 AL3
R/W
0
Alarm –Pattern set
Always write 0
ML4 ML3 ML2
R/W
0
Melody
Frequency set (low 8bit)
ML11 ML10
Melody
IALM4E IALM3E IALM2E
R/W
INTALM4 to INTALM0
269
TMP91C815
2 1 0
AL2 AL1
MELALM
R/W
0
Output
0:
Frequency
Alarm
1: Melody
ML1 ML0
ML9 ML8
R/W
0
Frequency set (high 4bit)
IALM1E IALM0E
0
Alarm
Interrupt Enable