LAPIS Semiconductor ML610421, User Manual, Page: 296 / 437

ML610Q421/ML610Q422/ML610421 User’s Manual
Chapter 23 Melody Driver
23 – 6
23.2.5 Melody 0 Tone Length Code Register (MD0LEN)
Address: 0F2C3H
Access: R/W
Access size: 8 bits
Initial value: 00H
7 6 5 4 3 2 1 0
MD0LEN
 
M0LN5 M0LN4 M0LN3 M0LN2 M0LN1 M0LN0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value 0 0 0 0 0 0 0 0
MD0LEN is a special function register (SFR) to set the tone length code of a melody when melody mode is selected and
buzzer output duty when buzzer mode is selected.
[Description of Bits]
•
M0LN5, M0LN4, M0LN3, M0LN2, M0LN1, M0LN0 (bits 5-0)
When melody mode is selected (BZMD bit = “0”)
M0LN5 to 0
Description
Sets the corresponding tone length code.
For tone length codes, see Section 23.3.3, "Tone Length Codes".
When buzzer mode is selected (BZMD bit = “1”)
M0LN5 to 4 M0LN3 M0LN2 M0LN1 M0LN0 Description
* 0 0 0 0 1/16 DUTY (initial value)
* 0 0 0 1 1/16 DUTY
* 0 0 1 0 2/16 DUTY
* 0 0 1 1 3/16 DUTY
* 0 1 0 0 4/16 DUTY
* 0 1 0 1 5/16 DUTY
* 0 1 1 0 6/16 DUTY
* 0 1 1 1 7/16 DUTY
* 1 0 0 0 8/16 DUTY
* 1 0 0 1 9/16 DUTY
* 1 0 1 0 10/16 DUTY
* 1 0 1 1 11/16 DUTY
* 1 1 0 0 12/16 DUTY
* 1 1 0 1 13/16 DUTY
* 1 1 1 0 14/16 DUTY
* 1 1 1 1 15/16 DUTY
Note: In buzzer mode, the M0LN5 to M0LN4 bits are not used.(Don't care)