Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User's Manual
Chapter 23 Melody Driver
FEUL620Q504 23-5
23.2.4 Melody 0 Scale/Tone Length Code Register (MD0TL)
Address: 0F8C2H
Access: R/W
Access size: 8/16 bit
Initial value: 0000H
7 6 5 4 3 2 1 0
MD0TON – M0TN6 M0TN5 M0TN4 M0TN3 M0TN2 M0TN1 M0TN0
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
15 14 13 12 11 10 9 8
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
MD0TL is a special function register (SFR) to set the scale code and tone length of a melody when melody mode
is selected, and a buzzer output frequency and duties when buzzer mode is selected.
Description of Bits
•
M0TN6-0 (bits 6 to 0)
When melody mode is selected (BZMD bit = “0”)
M0TN6 to 0
Description
Sets the corresponding scale code.
For scale codes, see Section 23.3.4, "Scale Codes".
When buzzer mode is selected (BZMD bit = “1”)
M0TN6 to M0TN3 M0TN2 M0TN1 M0TN0 Description
* 0 0 0 4.096 kHz (initial value)
* 0 0 1 2.048kHz
* 0 1 0 1.024kHz
* 0 1 1 683Hz
* 1 0 0 512Hz
* 1 0 1 410Hz
* 1 1 0 341Hz
* 1 1 1 293Hz
[Note]
In buzzer mode, the M0TN6 to M0TN3 bits are not used (Don't care).