HT38A5 Holtek Semiconductor Inc., HT38A5 Datasheet - Page 5

• Manufacturer Part Number: HT38A5
• Description: Ht38a5 -- 12 Melody Music Generator
• Manufacturer: Holtek Semiconductor Inc.

Timing Chart
Note:
Data Type (Command)
Melody List
Rev. 1.00
00h~0bh
40h-4fh
50h
Command
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
400ms after power up, the device will be ready to communicate with the external CPU using the CLK and DATA
lines.
Communication via the CLK and DATA lines is conducted in a simple manner. The device will obtain its data on
the high going edge of the CLK line. If the device does not receive a complete byte within 50ms then the pres-
ent byte will be discarded and the next byte will then be received.
Even-parity is used for data checking. For the previous 8-bits, if the total number of 1s is odd then the parity
bit is set to 1 , otherwise it is set to 0 . If the parity is incorrect then the byte will be discarded.
This command will select and play one of the 12 stored musical melodies. If the chosen melody num-
ber exceeds the highest number of that stored in the device then the command will be ignored and no
action taken.
16 level volume control, 40h refers to highest volume
Stop play
English Song Name
Toreador Song
Jingle Bells
Chinese New Year
Santa Lucia
My Old Kentucky Home
La Cucaracha
Allegro
I m a Little Teapot
Sabre Dance
Happy Birthday to You
Working on the Railroad
Radetzky March
5
November 2, 2006
HT38A5