Specifications

S1C62N82 TECHNICAL HARDWARE EPSON I-81
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Melody Generator)
(g)Tempo generator
The configuration of the tempo generator is shown in
Figure 4.11.7. The tempo generator is a circuit which
generates the 2 types of tempo selected by mask option
and consists of the 4-bit counter in which the output
signal from the divider is input and the 4 switches which
set their respective bit. The 4-bit counter output serves
as the note generator input. The 4 switches are auto-
matically set to generate the 2 types of tempo selected by
mask option. Bit settings and the corresponding tempo
generated are shown in Table 4.11.2. On the other hand,
the relationship between the 2 types of tempo selected by
mask option and switch settings are shown in Table
4.11.3. For example, if the respective bit values of the 2
types of tempo selected by mask option are "1" for
TEMPC = 0 and "0" for TEMPC = 1, the switch setting for
this bit combination will be TEMPC (reverse signal of the
TEMPC register output).
Table 4.11.2
Counter setting and tempo
Table 4.11.3
Tempo and switch setting
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
TS2
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
TS1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
TS0
30
32
34.3
36.9
40
43.6
48
53.3
60
68.6
80
96
120
160
240
480
TS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
0
1
TEMPC=0
0
0
1
1
TEMPC=1
Pull down
TEMPC
TEMPC
Pull up
Switch Setting