W742E Datasheet, PDF (24/60 Pages) Winbond – 4 BIT MICROCONTROLLER

W742E/C811
Fs
Fosc/64
Fosc
MR1.0
MOV TM1H,R
MOV TM1L,R
4
4
MR1.3
MR1.1
Auto-reload buffer
Enable
8 bits
FT
8-Bit Binary
Down Counter
(Timer 1)
Disable
Reset
Set MR1.3 to 1
S
Q
R
Underflow signal
EVF.7
1. Reset
2. INT7 accept
3. CLR EVF, #80H
4. Set MR1.3 to 1
2
circuit
Reset
MFP signal
MR1.2
MFP
output pin
MOV TM1L,R or MOV TM1H,R
Figure 5-7 Organization of Timer 1
For example, when FT equals 32768 Hz, depending on the preset value of TM1, the MFP pin will
output a single tone signal in the tone frequency range from 64 Hz to 16384 Hz. The relation between
the tone frequency and the preset value of TM1 is shown in the table below.
Table 2 The relation between the tone frequency and the preset 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
O^E
F
164.81
174.61
62H
5DH
165.49
174.30
329.63
349.23
31H 327.68
2EH 372.36
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 390.09
29H 420.10
26H 443.81
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).
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