BMSKTOPASA900(DCE) Toshiba, BMSKTOPASA900(DCE) Datasheet - Page 787

• Manufacturer Part Number: BMSKTOPASA900(DCE)
• Description: KIT STARTER TMPA900 USB JTAG
• Manufacturer: Toshiba
• Series: TOPASr
• Type: MCUr

Specifications of BMSKTOPASA900(DCE)

• Contents: Evaluation Board, Cable(s), Software and Documentation
• For Use With/related Products: TMPA900CMXBG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.23.3
Compare flag
Compare flag
MELOUT
Counter
3.23.3.1 Melody Generator
Operational Description
XTIN
(1) Operational overview
Based on the low-speed clock (32.768 kHz), clock waveforms at any frequency from
4 Hz to 5461 Hz can be generated and output from the MLDALM pin.
The melody frequency is calculated as below.
By connecting buzzer etc outside, melody sounds can easily be played.
Melody output waveform
Melody setting value
Note: The value N is set through the MLDFRQ<MLDF> register:
*For the above equation, see the waveform diagram below.
(For reference: Basic tone scale setting table)
XTIN = 32.768 [kHz]
00
scale
Tone
C
D
G
C
E
F
A
B
N = 1 to 4095 (0x001 to 0xFFF)
01
Setting N = 0 is prohibited.
・・
・・
Frequency
Figure 3.23.1 Melody waveform
・・
[Hz]
264
297
330
352
396
440
495
528
TENTATIVE
・・
TMPA900CM- 786
2N + 4 clocks
N + 2 clocks
・・
・・
f
N = (16384/ f
MLD
MLDFRQ<MLDF>
Register value: N
・・
[Hz] = 32768 / (2 × N + 4)
・・
0x03C
0x02D
0x01D
0x01F
0x035
0x030
0x027
0x023
・・
MLD
N N + 1
) − 2
00 01
Counter cleared by
the compare flag
02 03
,
TMPA900CM
2009-10-14