Specifications

I-80 EPSON S1C62N82 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Melody Generator)
(f) Divider
The configuration of the divider is shown in Figure
4.11.6. It is a circuit that divides the clock (32,768 Hz)
which is input in the melody generator and inputs the
divided clock into the tempo generator. The dividing ratio
may be controlled by software. The data of the "CLKC0"
and "CLKC1" registers in the above-mentioned controller
is input and the dividing ratio will differ according to the
value of the input data. The dividing ratio and playing
speed for the combinations of CLKC0 and CLKC1 values
are shown in Table 4.11.1. The "normal" speed in the
playing speed column refers to the playing speed by
which the tempo listed in Table 4.11.7 may be imple-
mented. playing speeds 8 times (the normal speed) or
more are useful for generating sound effects.
Table 4.11.1
Dividing ratio
0
0
1
1
0
1
0
1
1/512
1/64
1/32
1/16
Normal
8 times
16 times
32 times
CLKC1 CLKC0
Dividing
Ratio
Playing
Speed
Fig. 4.11.6
Divider
32,768 Hz
1/2
divider
1/2
divider
1/2
divider
1/8
divider
1/8
divider
CLKC0
CLKC1
To tempo
generator