W742C814 データシートの表示（PDF） - Winbond

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W742C814

4-BIT MICROCONTROLLER

Winbond 

W742C814

Table 3. The relation between the tone frequency and the present value of TM1

3rd octave

4th octave

5th octave

Tone

TM1 preset value Tone

TM1 preset value Tone

TM1 preset value

frequency & MFP frequency frequency & MFP frequency frequency & MFP frequency

C

130.81

7CH 131.07 261.63

3EH 260.06 523.25

1EH 528.51

C # 138.59

75H 138.84 277.18

3AH 277.69 554.37

1CH 564.96

D

146.83

T D # 155.56

6FH 146.28

68H 156.03

293.66

311.13

37H 292.57

34H 309.13

587.33

622.25

1BH 585.14

19H 630.15

E

O

F

164.81

174.61

62H

5DH

165.49

174.30

329.63

349.23

31H 327.68

2EH 348.58

659.26

698.46

18H 655.36

16H 712.34

N F # 185.00

G 196.00

E G # 207.65

58H 184.09

53H 195.04

4EH 207.39

369.99

392.00

415.30

2BH 372.35

29H 390.09

26H 420.10

739.99

783.99

830.61

15H 744.72

14H 780.19

13H 819.20

A

220.00

49H 221.40 440.00

24H 442.81 880.00

12H 862.84

A # 233.08

45H 234.05 466.16

22H 468.11 932.23

11H 910.22

B

246.94

41H 248.24 493.88

20H 496.48 987.77

10H 963.76

Note: Central tone is A4 (440 Hz).

6.11.3 Mode Register 0 (MR0)

Mode Register 0 is organized as a 4-bit binary register (MR0.0 to MR0.3). MR0 can be used to control

the operation of Timer 0. The bit descriptions are as follows:

3210

MR0 W

W

Note: W means write only.

Bit 0 = 0 The fundamental frequency of Timer 0 is FOSC/4.

= 1 The fundamental frequency of Timer 0 is FOSC/1024.

Bit 1 & Bit 2 are reserved

Bit 3 = 0 Timer 0 stops down-counting.

= 1 Timer 0 starts down-counting.

6.11.4 Mode Register 1 (MR1) & MFP Control Pin (BUZCR)

Mode Register 1 is organized as a 4-bit binary register (MR1.0 to MR1.3). MR1 can be used to control the

operation of Timer 1. The bit descriptions are as follows:

3210

MR1 W W W W

Note: W means write only.

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